1) I have to drive an expensive car to an expensive building to work on the same kind of computer and internet service I have at home. Why? Because effective management software doesn't yet exist.
Man, your work cheaps out on internet. Last place that made me show up at an office had gigabit to my desktop - and I could pretty most of that to the internet. This was in the crappy days.
Solution: Get world class at what you do. To the point where companies will put up with you working remote and part time for your skills. I work 32h/wk, remotely, for a former employer, and due to not having to deal with office stuff and meetings, I'm insanely productive. It's pretty cushy for living in rural farm country!
2) I don't know enough about electricity to buy a matching solar panel and window AC unit that would work together on hot days to cool my house for free.
That's because running a window AC unit off a standalone solar panel is hard. Grid tie the house, for cost savings, or go with an off grid capable system if you want to ride through disruptions and power outages. Doing a solar + window AC unit, without some batteries, is tricky. Doing solar + batteries + window AC is expensive. I should know. That's how I cool my office in the summer.
Seriously, window AC units are awful for efficiency. Get a good whole house AC, invest in insulation, and put some panels on the roof.
3) It takes 145 seconds for hot water to reach a faucet and shower in my house, but I don't want to spend thousands on a point of use water heater.
You don't need that. You need a hot water circulation system. Something like this:
http://www.homedepot.com/p/Hot-Water-Recirculating-System-with-Built-In-Timer-500800/100426993Basically, it pushes hot water down the pipes on a timer, and recirculates back through the cold side, with a thermostatic sensor involved. You take a shower every morning? Boom. Hot water. You run the sink for the kid's bottle every night? Boom. Hot water. Much more efficient than a point of use heater.
4) The toddler won't sleep.
They will if you crank the music, put the ear plugs in, and ignore them. They will, eventually, fall asleep. If you'd said "infant," I'd suggest a brown noise generator, earplugs, a sling, Kerbal Space Program, and whiskey (for you, mostly...), but toddler? They can cry it out.
5) The transaction costs for real estate are way too high. Someone needs to create a corporation that holds your property in a legal shell that can be transferred to a buyer for just a few hundred dollars, like a stock transaction, but tied to specific properties, cutting out all the fees and middlemen.
... that's probably going to upset an awful lot of real estate types. Valid business idea.
6) Can't figure out an easy way to pay off one rewards credit card with another rewards credit card.
The stupid "3% fee but 0% APR for 18 months" checks they keep sending you?
7) One must wash dishes before putting them in the dishwasher.
Run the faucet to make sure the water in the kitchen is hot before you start the dishwasher. Works well with the water heater circulating pump linked above.
8) Certain things are not sold in bulk, like gluten-free noodles.
... huh. That surprises me. You seem to be right. Have you tried Costco?
9) It's hard to find historical charts for stock options.
Can't help there. Business idea!
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To the OP: Find what you're good at, or at least what you enjoy. Get good at it, find an opportunity.
Or go for the luck approach. Throw a bunch of (gluten free) noodles at the wall and see what sticks. I would not have expected to make nearly 5 figures a year on the side doing electric bike battery rebuilds based on having rebuilt a pack for a coworker and publishing a blog post about it.