2500 can be spent in a heart beat with a good set of coilover springs $750-1500/shocks and springs $450-750. Intakes $120-400. Headers $100-250/y-pipe $40-120. Exhausts $150-450. Wheels $500-6000.
All of which what YOU want. So prices may vary...but, since you want JDM..thats going to cost you a pretty penny. G/l on your quest bro.
I wouldn't necessarily go with what is cheap. There are a lot of great turbo kits that are in the for sale section right now that are a awesome prices. I personally like turbos better than s/c, but that is just personal preference. But if you want to go the turbo route, keep checking the market place and I am sure that you can get a good deal.boost would be awsome!...but thats around what like 6g for a srt kit and a extra 2g for inhouse install and tune?...8gs?..i think it would be very worth it since i think 4doors are hot and i love supras!...but 8grand man! isnt a supercharger cheaper?...oh and i have no clue where i would find a s/c kit either. iv searched and dont remember if any has got me yet