Your customers can be anybody with wheels. Target the average driver on the street as well as corporations and institutions that will be delighted to have you arrive on-site so their employees don't need to be away from their desks. RV parks and private campgrounds are also fertile grounds for customers--people with boats or recreational vehicles always need some sort of assistance, and people who are living in them have a hard time leaving them at the auto repair shop overnight. Hotels and motels can also be good customer sources because out-of-town guests with car woes have no idea where to turn for expert help and are usually pressed for time.