I started racing 1/32 scale cars about a year and a half ago. My friend bought a Ninco track that we setup in his living room. We soon realized that it was a blast and I bought a set. Then we got on e-bay and bought an additional 500ft of track. We re-did his basement and built an 8x20 table and started at it. We've changed the track configuration about 6 times. At first we were trying to draw up plans for a layout, but we downloaded a program ( tracker2000 ) that allows you to input how much track you have and exactly what pieces you have ( sharp curves, light curves etc.. ).
Cars cost about $30 - $90 ( I've seen some as much as $500 ). I own 12 1/32 and about 6 or 7 1/24 ( some are in pieces! ). The controlers that you get with the set suck, so we went out and bought adjustable controllers for about $75/ea.
You can change the motors, the wheels, the tires, the frames... it can get costly. I think we have spent somewhere close to $2000 or so. Not including the money we spent on the basement.
Its a fun hobby. Can't do much outside during the winter so its a great way to have fun indoors. I've told friends about it and they laugh, but as soon as they get down there and see it, they don't leave for hours.
After 4 or 5 beers it gets hostile.
If you are interested in it, check out www.slotcarillustrated.com its a great site with chatty forums like this one!!
Marke