I used to be the Vice President at a track in Wa State. Insurance will run you about $100,000 a year. If you can find a airport with a back-up runway it will save you a bunch of money if you can convince the Port of **** to lease it to you for $4,000 a weekend. The zoning will help you obtain a business license because airports already make noise. Then set-up the race track as a not-for-profit orginazation (car club) to reduce your hired help people related expenses. I had 32 people in our club and only 3 paid employees. The timing equipment will cost about $75,000, support vehicles and equipment $25,000, fire department on site cost $12,000 a year. The other option is to build one on Native American land on a 99 year lease, you can eliminate most of the red tape with permits and zoning.