I'll try to reply to everybody. Regardless if you think I'm a dbag, I appreciate your input. I was trying to be brutally honest as I want unfiltered advice.
1) I take care of my kids 42% of their lives. Annually, my ex gets my kids 52 more days per year than I do. When I agreed to pay her 700 (we settled and this was not mandated by court), I had no inkling that I could retire if I lived more simply. I have 1.2 million at 4% spend down = 50k annually. We spend about 60k annually. and that means I have a bit of gap.
2) At the 11th hour of divorce, my ex inserted a bit of language that made me responsible for 100% of transportation. I did not appreciate the extent to which I would resent this, as my ex uses this as a weapon against me. During one of the handovers, this driving was costing me about an hour so that I can pick up girls clothes (that she was responsible for providing). I asked her to compromise and meet at work for this transfer (we work less than 2 miles from each other). She refused. She was expecting me to drive an hour to pick up a volleyball jersey for my girls. So, I said that I can't continue to pay for expensive extracurricular activities if she can't compromise. I also went out and bought a bunch of clothes for my girls, at no small cost to avoid this drama. When I have the girls, I don't ask my ex to subsidize OUR extracurricular activities. My daughter signed up for a swim team for the month that I have them for summer...I paid the fee. My other daughter signed up for a volleyball camp...I paid that fee.
3) At my full salary, I make about $20k more annually than her (120 versus 100k) which in her mind requires me to give her about half of the differential. REGARDLESS of how much time I spend taking care of kids. I don't understand this, as it seems irrational to me. If she found I got a huge raise, would she hit me up for more money???? I dunno...divorce is irrational.
4) Why does it matter? I'm loaded right? I dunno...if I make 120k and owe her half of the differential, it seems that if I start drawing down my income, then maybe that number should change a bit? I'm not sure...I've come to terms with the notion that the money I send her MIGHT be used for things like housing, food, etc or MIGHT be used for frivolous things. And I've come to terms that it's none of my business how she spends that money...it's hers. It rankles me a bit that she got to work part time for 10+ years, walked away with half of our savings, I have to send her that much child support, AND I can't reduce that cause I want to work part so I can spend time with my newborn son and daughters when I have them.
5) Somebody said I was spending 100k annually and therefore not mustachian....Really? We are saving 60k annually in after tax income, saving 37k annually in max 401k savings, and 11k in roth IRA. I reckon we could save a bit more, but it's getting pretty lean. We don't have car payments, live in a very small home, we don't eat out, we stopped drinking when my wife got pregnant, I ride my bicycle to work when I don't have the girls, bike to grocery store occasionally. It might not be 100% mustache, but we probably live within 10% of that ideal.
6) I understand that this is an emotional subject for me, and maybe some of you. I want what's best for my girls. I don't want them to resent me (that's something I hadn't considered in my math). I want them to grow up to be:
Independent, Kind, and Happy. I think the problem is that I want what I consider to be fair. Ex might disagree with that last part I reckon.
So as I've said, I have gone through this process. If you want some input, I'll be happy to share what I can.
First, divorce is not fair. My divorce was amicable and swift and the judges response at the end was "You both look unhappy with where we ended. Good. That means where we arrived is likely fair".
So I contend that what you should look at is reframing how you view everything you spoke of.
For #1, my ex wanted to just have me have the kids 100% of the time. I did not agree with that because the kids want to see their mom. Our divorce decree as written has her having them 4 days a month and me the rest, or using your math, 86% of the time I take care of my kids lives (I feel both parents are always involved but I get your point). Even with that she still owed me child support per the worksheet. She was upset. The judge let her know, "Child support is not negotiable. It is mandated." (to Saucy's point, as I said you cannot negotiate with the court, only with each other and then the court needs to agree). She owed $120/month for three kids or $40/child/month. In consultation with my attorney we granted a waiver. After all someone who does not even want the kids will not pay and then we need to go to court to try to get garnishment, which I was shown how tough that is and it also a percent of what they make, and she has low earning potential so it would likely be 40 years before I could see what she owes me. I'll explain in point #2
For point #2, do not punish your kids for your exes failure to comply. Reframing. Taking away the kids activities because you have to spend more for transportation because your ex does not do her part is a bad spot to be in. She can then just turn around and let the kids know, "mommy would like you to go to x, but I can't pay by myself and daddy won't pay his part". How are you going to respond to that? You going to throw mom under the bus? I can tell you how that will go because I've counseled dozens of people who did just that in divorce support groups. It's ugly, your kids will hate you for it and it will still be your fault. It does not work, because it is true. Daddy is not willing to pay his part. It does not matter that mommy did not do another part that had nothing to do with the kids and only had to do with your wallet. I am in this exact situation. We are to split transportation just like you and she also immediately let me know that she can't afford to drive/does not want to do it. I explained why I thought tossing the kids in with consequences is a poor choice. So what do you do? At this point the kids are old enough to drive on their own. We have a car they drive over in. My ex then had them run errands using our gas and car to do them. I tell her I would like her to not do this every once in a while. She ignores me. So what can I do? We once thought about not allowing the car over there, but then her response is she cannot get the kids to their activities/jobs because it costs to much/she's too busy, so then we end up driving over to take them which takes more gas than if they just use the car for extra errands at times. I also have $10K of medical and dental costs she paid $200 on until she decided she wanted no more of it. The first summer after we divorced I had to place the kids in YMCA day camp because they were too young to stay home by themselves and I had to work. For three kids that was about $8,500 for the summer. A reliable babysitter for three kids was $20/hour for 50 hours with travel time for 12 weeks, so more. Daycare would have been more for elementary and middle school kids. She paid nothing. Told me to let the kids stay home and it would be fine. Again, after several conversations with an attorney about how the process to try to collect this worked, and likelihood of favorable result, it just became not worth it as I'd likely be out legal fees and still get little or nothing. I also decided it was best to sell our house instead of keeping it (she could not afford mortgage so she moved to an apartment). None of us like the McMansion she had chosen so to improve cash flow I figured this out. My attorney wanted me to change the agreement before we finalized, but if I left her involved in the sale she'd be able to refuse offers, drag on deciisons, in short have a major ongoing impact on my cash flow, so I agreed to go forward with paying her half of the equity out and also covered all real estate costs which added up to about $70K I lost because I sold with no equity but still owed her half of something that was gone (2011 housing market) so sell quickly. But in the math I could unbury myself faster by doing that. I nearly had to borrow money from my parents to scrape up the $7,500 downpayment to get an FHA loan. All other non-retirement savings was cleared out in that process. The other thing you learn is that domestic court is it's own animal. For me this was the biggest education of getting divorced. I foolishly thought that you go to trial get a judgement and then it is done unless something significant changes. But no, in domestic court you can go back as often as you want. Don't like the judgement? Turn around and file again tomorrow and do it again. My wife's ex goes pro se does not work and lives off welfare so has all the time in the world and he uses this, to use your wording, as a weapon against her. At times she goes in pro se, but she has to take off work, loses income and risks losing her job (which happened in her divorce as it was over 30 days in court over 18 months). When it is serious, as in medical decision making for a child with a chronic health condition that dad ignores doctors instructions on and does not monitor, we hire an attorney and it costs tens of thousands of dollars each time with unknown outcome. If you've ever gone through the process you know once it begins, you are along for the ride. Guardian ad litem fees, court appointed psychologists all kinds of fun. It costs what it costs because there is no control when you are against someone who has no interest in settling because their whole goal is to just make it as expensive for you as possible, as a weapon. I offer all this detail again, as a source, a motivation if you will to reframe your thinking. You ain't seen nothing yet if you think this is uncomfortable in what an ex can do with you in terms of cost. Be happy it is only $700 and some extra transportation. You adjust your budget, your plans and you live your life.
Point #3. Divorce is irrational. I made some really weird looking financial choices up above, but you have to look at a bigger picture. Reframing.
Point #4. This one definitely needs reframing. Do you not see how you were able to have the career you did and become a high earner because your spouse only worked part time? It was the same for me with a stay at home mom. I could focus on the job, travel on a whim and do everything the company wanted which allowed me to advance quickly and high. We did not have to pay child care. Saying those things are free is not realistic. I could have avoided all the mess if I had actually made the choice of who to marry in a logical and rational way like I did with my second wife. But relying on "feelings" I ended up with a poor choice and it was a mess and we divorced. I consider what I had to pay in alimony payback that helped me learn what a poor decision I made and learn a lot from it. I also could see clearly the benefit I received from her being part time or at home. I could avoid worrying about the home front and it helped me advance at work.
On your last point, if you want to do what is best for your girls, just pay your child support, adjust your plans and your budget accordingly and live and learn. Focus on being a great dad. As you need to spend less on their activities us that to teach them the hard lessons of life and how to live within your means. Maybe you'll decide to cut other things so they can do their activities and you can teach them that way. Only you can decide if you are going to pick you over them. I could certainly retire 10 years earlier if my ex paid her part and/or I just told the kids they can't do anything. My kids did nothing to decide to end up where they are. Taking out the fact that my ex and my wife's ex do not do their part is not a rational decision to make and trying to get your ex to do what you want is an exercise to drive you quickly to insanity. Make peace with what it is and move on. Your situation is not really bad at all. It is also important for you to realize that in many cases the kids cost more because you are divorced (clothes, toiletries, etc.) that they are not going to carry back and forth, so they have nearly full wardrobes and such at each house. So it's a fallacy you need to reframe that somehow all this has no change to finances. You ended up in an exceptionally great situation. Stop crying over the little pain you have compared to most other situations.