S13 deviat here on the forums, has a well sorted S13 for supersprints. As Jay said, dont dismiss them just yet
With that sort of budget, there are a few S13's around!
But with what Troy has said makes good points. Motorsport isnt cheap, if you get a car for a bit more like a 32 gtst, you can have plenty of fun with minimal mods!!
I've decided to get away from the R33 for track days as it was just going to cost too much to run, now have an MX5 clubman which has already worked out cheaper for me!!
But either way, you'll have fun, and its addictive!!!!