I think you'll find they're bigger. 31s are under braked even N/A, you're a d*ckhead if you slap a turbo on and keep the std brakes.
Technically NO.
You can sell bits off the car to get money back into the budget, but if you sell the whole car and start again you'll be starting with a clean slate of $2000.
Mine cost me $1400 and so far I have sold just over $1000 worth off stuff from it, meaning it's effective cost was only $400 (sans wheels and diff, since I sold those ). So if you can sell some stuff off yours you'll be laughing.