After writing it, I realized this could come off as "tough." Please don't take it as criticism of your lifestyle. These are just things to think about coming from someone who has made different choices than you have. We spend a lot more on travel than you do, so nobody's perfect.
Also take it easy on your wife with all of this. I realize that a lot of the things I mentioned could hit a little closer to home for her than for you since she's probably the one doing the shopping/cooking, wanting to keep the kids entertained during the day, doesn't have the work paid for cell phone, etc, etc. Try to tackle things that don't really impact her too much first. When she sees you making sacrifices she'll probably want in on it.
Regarding my FI number - does it grow each year or stay the same? For instance, if I'm shooting to live on 50k/year that would be 1.25M to retire. But that's today's dollars. When I'm 50, wont the 50k need to adjust by cost of living increases? does my final number have to increase year by year?
Your FIRE number will grow at the same rate as your expenses, whether that's from lifestyle inflation (buying more of whatever) or regular inflation (the things you buy becoming more expensive). However, you should do all your calculations in real/current dollars because that makes the numbers relatable (they "feel" right because you have a good idea of what that amount will buy you) and it makes the math easier. To do this you just use real (inflation adjusted) growth rates in your calculations. Historically that's been around 7% for stocks. I use 5%. If you are to believe the pessimists about future returns (which, to be fair includes some heavy hitters like Vanguard founder John Bogle) it could be even lower in the near future.
Every time we evaluate the premium media services we struggle. Netflix has new shows I watch every week, Hulu has new shows as well that I watch. Cable would make the most sense, but if I kept my internet where it is at and kept the home security the wife likes for when I travel for work - I'm only cutting $60/month. I know that grows with time - but we have a 1TB data cap with Comcast that we're getting close to each month. we hit around 750GB. So - what happens to that cap when I have zero cable - now we're streaming 100% instead of just 50% (Estimates) - so now my data cap overages exceed the cable costs potentially. It's $50/month more for unlimited which matches my cable essentially. Curious if people will agree that 750GB is pretty normal or think it's crazy. I've verified my security is strong so no one is borrowing data. We fall asleep to streaming TV comedies each night which might contribute a bit.
Wow, that's a lot of data! I just took a look at the 7 months we've been with our current internet provider at we've averaged 90GB with the highest month being 156GB. We stream (netflix) at about 3 one "hour" shows per day, although I've been known to go through phases of watching more. Let's say that's 45min/show, 3 shows, is 135 min/day at 90GB/month or 3GB/day in a 30 day month so that's 0.022GB/min of streaming. There are 1440 min in a 24 hour day, so if we constantly streamed all day and night that would be 32GB/day or 960GB in a 30 day month -- still under a TB.
The normal settings for netflix are to advance to the next show automatically, but you can disable this feature. Try doing that. If you're too asleep to advance it to the next show you don't really need it playing do you? If that doesn't work there's something else hogging the data, so keep looking for what that could be.
On the streaming subject, do you really need netflix, hulu, and Prime? I get that you have shows you're watching on each of them, but is that really worth giving up your future for? Missing a show seems like a pretty small sacrifice, so it's a good place to start becoming a badass. Try cancelling at least netflix or hulu and keep the other an prime. That should give you plenty of content. You could even cycling through by cancelling one at a time and binge watching the shows on the other until you catch up.
Some thoughts on your other expenses:
Amazon (based on past history) $50.00
Toys/Gifts/Xmas $166.67
Fast Food $100.00
Grocery $750.00
Clothes $50.00
Costco $250.00
Lowes $25.00
Target $250.00
That's a lot of spending on food and stuff. I would track that more closely and see what all you're getting for that money and whether it matches your values.
How do you feel about the fast food spending? How to does it physically make you feel? Is it a convenience for when your wife is too busy? Could you take up some of the cooking slack? Maybe make some make ahead freezer meals? Or even just get some frozen pizzas (not healthier, but cheaper at least) for when she's too busy/stressed to cook?
Pest Control (not doing it myself) $33.00
Try to find out from neighbors if any of them aren't doing this. It might be necessary where you live (more likely in warmer climates), but it's definitely not necessary everywhere. And assuming this means spraying poison, is that something you want around your kids?
Same with the roof moss control you mention elsewhere. We had moss on parts of the roof of the house we used to own. So did our neighbors. How much does having it removed really extend the life of your roof? I don't know the answer to that, but it would be worth looking into.
Haircuts $29.17
How much of that is for you and any boy children? If any, then I would like to introduce you to
https://www.amazon.com/Wahl-Complete-Accessories-Professionals-79300-1001/dp/B00006IVEN/ and since the scissors that come with that are crap
https://www.amazon.com/gp/product/B00KVYBY8M/You could do it yourself for a simple buzz cut, and even something short, but a little more advanced (longer on top than sides) isn't that hard with help. Let's just say my wife isn't that talented with the hand-eye coordination, but she's getting pretty good!
Supposedly long hair is pretty easy too (there are some youtube videos with instructions), so you could even move on to girl children and then your wife once the boys have blazed that trail.
Spotify Family $16.00
Movies / Dates $41.67
Amazon Freetime $3.24
Scholastic Reading (books/fundraiser) $9.09
Comcast (includes cable, internet, security) $156.00
Tivo Bedroom Mini $6.49
Tivo Main Annual $11.65
Amazon Prime $8.25
Hulu $11.99
Netflix $12.00
You are one well entertained family! Do you have time for all of that? I know the individual dollar amounts aren't that high, but this feels like a good place to start stretching some mustachian muscles without too much pain.
Cell Phone ( this is wife, my cell phone is free from work) $123.58
I know you said part of this is the payment plan on the phone, but still. Look into MVNO's. Cricket runs on AT&T's network and is unlimited everything. It wouldn't save a lot, but it's something. If your wife is home all day then some careful use of data when not on wifi could open a whole bunch of other options. My wife and I pay around $25 for the two of us on Ting, but we're more careful with all data/text/talk than I think most people are willing to be.
Try to buy your phone in cash next time. For that matter, consider buying used next time. I bought a 5s used a few years ago and it's still working just fine.