Like you said, it will vary week to week, but for a team like ours with two people, it runs us $50 for admission weekly, about $10 for gas for the car, and about $10 in gas for the transportation vehicle. Tires don't cost us anything, we just get them off of the used tire piles that you can find anywhere. Finish in the top 3 and you break even, finish in the top 10 and your gas bill is payed.
Last year was our first year and including the purchase of the car, safety equipment, a trailer and all admissions we had spent about $4000. That doesn't take out race winnings and sponsor donations.
Any other questions feel free to ask.
Brandon
Super Six Team 89