You know, you don't really need a 12 volt battery, power panel, and electric starter for your plane. I started flying this last summer and I've relied on a simple chicken stick. It works plenty fine - only once I really couldn't get it started after aout 50 flips, and a club member helped me with his starter. Turns out that the carburator was unseated and was leaking air (due to a crash), which was te problem in the first place, I went back to normal starting with the stick after the fix.

Anyway, think about it - I spent about 75$ less by going with the stick and I'm pretty happy!

As for the rest, start small and you'll see what you need as the season goes on, this way you save a lot of money on otherwise little used equipment.