04-05 miata = 10-15K plus bell engineering turbo kit (top of the line you'll spend ~5K) plus clutch, exhaust, enginer management etc... budget another 3-4K WORST CASE SCENARIO you've met your budget at 24K and you've got aa reliable RWD roadster with 275-300 at the wheels EASY on a street tune, that's capable of running pretty good 1/4's and TEARING UP auto-crosses and road tracks.