I've always got that track itch, and am always torn about what to do about it.
Current situation - I have a '98 Boxster that I throw race seats and race pads on for a DE weekend - it's a great, fun track car, but if I went anymore down that slope, then it would become less of a road car and more of a track car, and I don't really want to do that. Also, I don't have a trailer / tower (I have a 2007 CR-V, but that can only haul 1500 pounds).
Being as how I like the mid-engine feel, I started looking for 914s - they are pretty cheap and make excellent track cars. I do a lot of mods for it to be a fun track car and still be street legal to drive to events. However, then I'm left licensing a car, insuring it, etc., plus I'd have to rent a garage to store it because I only have a deep two-car at present.
So, then I got down the path of a Formula car, like a Formula V or Formula First. Fun cars, cheap, light enough to be towed by the CR-V, and could probably fit sideways in front of the Boxster. I'm not completely off this kick, but I'd be looking at around $15K - $20K for a car.
I got to talking to someone, and they were saying that you can build a very lightweight car using a motorcycle engine and transmission. I started searching the Web and found this:
http://www.stingraymotorsport.com/
It looks perfect - mid-engine, sequential gearbox, tons of fun, and I could probably assemble it myself for less than $10K. Unfortunately, they are only sold in the UK, but I'm working on that.
Opinions?