In another thread, it came to light that iRacing can run one $5000 fairly easily. Granted, that may still pretty good for those who don't have a lot of trackdays/autocrosses in their area. However, it got me thinking: could you get into HPDE's and autocrossing for that? Front-running spec miatas go for $10k or so, so we'll call that a non-option. You have to run several HPDE's before you can get a road racing license with NASA, and they're still much cheaper than an SCCA racing school from what I can gather. I figure $1000 in fuel/entry fees for local track days is probably enough to get in deep enough to know whether it's your thing. That leaves $4k and a question: can you build a serviceable track car for $4,000? If so, how much lower can you go?
Note that I'm not interested in building a winning race car, which is much more expensive. I'm trying to figure the cost for a decent track car. It has to be reliable, preferably with a strong aftermarket, RWD (at least my preference), manual tranny, and must remain street legal, since we're not figuring in a tow vehicle. Also, let's go ahead and disqualify locosts, since the real costs are questionable (how much would it cost to hire a welder to assemble a car for you?) Thoughts?