Is there a way for the track to be separate the 2? Shop from the track. Make the track non-profit and the shop a business.
Knowledge is key. Inventory is important, but racers don't drive a track.
EMBRACE THE BASHERS!
Bashers can become racers. You need them to come, drive, have fun. Keep the atmosphere fun. Lap counting systems are expensive, keep that in mind. Buy in for distribution can be VERY EXPENSIVE! Be selective when picking cars and things to carry.
Good luck.
MOmo