If you can find a place to race, here's a couple ideas on how to get a racing program off the ground.

Talk to your local firestations and see if they have any old fire hose that they will give you for free. They should have a bunch and be more than happy to get rid of it. It is pretty flexible and stays put pretty well. Use that to make your track layout.

Tower sells Tamiya corner dots. They're a little on the pricy side, but here's the link. http://www2.towerhobbies.com/cgi-bin...?&I=LXGH44&P=7 You can also use plow disks. I have no idea where you buy them, but they are used on those plows that a tractor pulls in a field before you plant the crops. Hopefully that makes sense! They're steel, so they stay put pretty well. You can use them to anchor the firehose.

Your local hardware shop (Home Depot, etc) should sell an inexpensive leaf blower that you can use to blow off the track area. I bought one for around $90.

Spray the racing surface with soda to get more grip. Home Depot should have an inexpensive bug sprayer that you can use to spray a nice even coat of soda on the racing line. You should check with the parking lot owner to make sure they don't mind you spraying their lot. Soda is pretty harmless, so they shouldn't mind. WalMart's "Sam's Choice Grape Soda" works well.

If you can get a regular group of racers together, you should be able to figure out a way to raise the cash necessary to buy a transponder system. The AMBrc system is around $2000 and the personal transponders are $50. Good luck!