You can always race a UTV. Last weekends race in Rocky Point had 5 UTV's racing. If your not a UTV fan I have some connections on finding you a car in Tucson. I know of a Truck and a Class 5 for sale in Tucson.
Thought I would take some time to help you along on the "which class" question. Stop and decide your mechanical abilities. Are you a VW engine guy or watercooled engine guy.Where will you race? SNORE (Nevada) SCORE (Baja) BITD Basically Nevada. CODE/RECORD (Mexicali/Ensenada area) SADR (Rocky Point). Everyone will tell you what class you SHOULD be in, but never find out what types of resources you have.