define cheap? I spent $95 for the ticket, and the gas to get there (40miles each way). There are two races a year.
Compare that to going to every home football game at the Georgia Dome (if I was a Falcant's fan). Even for nose bleed seats, you are paying ~ 50 bux, plus parking (parking is free at NASCAR tracks), plus getting there, plus eating because there is no tailgating that I know of.
In the end, going to all of your "home" races is much cheaper then attending all of your "home" football games