I have no objection to a Fox at all. But let's revue the full rule set carefully. They can barr entry if they think a car is too nice, buy at the end of a race for $500, or destroy any car at will. Being barred entry is one thing, but to donate much and see it handed over for $500, or worst destroyed would suck quite a lot. Just want to avoid unpleasant scenarios and stay well within the rules.
How long tires last also has a lot to do with drivers preserving them . . . . I'm a bit worried on this score.