The season championship is worth even more. I can't do that. Yes, you can. And the cars are cheap, reliable, and durable. Best of all the cars use spec components which means that you won't get outspent by the next guy trying to keep up.
Some races are also spectator events.
Mazda RX7 12A engine cars. Provided that the car isn't full of rust or in need of body work, your first order of business is safety equipment like a roll cage, harness, fire extinguisher, etc. The average backyard mechanic can easily install a bolt-in roll cage. All you need is a drill and a socket set. But before you even pick up the newspaper, order a Pro 7 rule book and the Club Codes and Regulations.