demonmaestro: Looks like a nice project!
Firstly , Whatever you do is a good project
as you will learn and have fun. Some pointers below (but be aware that these are only my thoughts that you should decide to ignore or consider as you wish) I hope others will also chip in.
Your biggest challenge is the $200 cost....
I think you could use less power if youwanted, but it looks like you are using about 25ah a day so you'd need a 100ah 12v battery to keep you above the 50% depth of discharge that you should aim for (go lower and you damage lead acid)
Personally I'd get a Gel/AGM deep cycle if possible as they don't lose as much charge during inactivtiy OR I'd get a 'free' battery to play with and learn and save up for a proper Deep Cycle (the free option would keep your costs low but will be rubbish)
Get a good converter from 12v to 5v don't just rely on a cheap car usb port as they are likely innefficient. (or get a cheap car adapter to keep costs low and upgrade later)
Nice to have a combination of wind and solar. good idea. Get the wind generator up HIGH as that will Massively improve its efficiency.
I don't think I'd buy that controller. It has 3 stage charging which is good
but it doesn't say what voltage it is charging to. Just says '12v nominal' Personally I'd want to know if its charging to 13.7v (bit low) 14.4v or 15v (bit high) or somewhere in between. Lead acid will slowly 'sulphate' if the voltage is low. Knowing what its doing is important. So I'd get a different one where it says what the end voltage is. Then you can read up on your battery what it needs and get them matched better.