If you don't want to race for spectators, I suggest bying a sportscar, joining a club, and have the club rent someplace like Putnam Park. You will never have to worry about paying spectators. It is all about the competitors. Lincoln Park has a large grandstand. I am sure part of the business plan is to fill it up as much as possible. Keeping customers happy, gives you a place to race. Just as spectators have lots of options, so do you. Do what makes you happy.