Re: Young enthusiast.
Welcome to the forum. Don't overlook the possibility of your first EV being purchased already converted. You'll want to be careful to not buy someone else's headache, but used EV's don't have much of a market, and sometimes you can find one at a good price that the owner has gotten tired of, or is not capable of repairing themselves.
I purchased my (factory converted) EV for $1,900. It had a brand-new $600 K&N charger, and ran and drove alright. I put some time into fixing small niggling things that it needed and drove it two years before it even needed new batteries. Then I took tax credits and deductions in excess of the purchase price!!! (Yes, this was an exceptional find!).
Once I got into the car, I spent much time and some additional $$$ to pimp it out, add race-prep suspension, add to the instrumentation, put in a thumpin' stereo, etc.
Can't promise you'll find such a god deal, but a halfway decent used conversion could launch you into EVism quickly, and provide you with parts and experience without a huge cash outlay. After you get the hang of it and have more disposable cash, then you can start on your second conversion from scratch, incorporating the things you've learned from the first vehicle.
Stick around, the best is yet to come.