Mate, it probably sounds great in theory and it would be easy money hence its appeal. But apparently its not all its cracked up 2 be. I have a mate who has a walky and temed up with a mate and charged a considerable amount more than you are planning. Anyway he threw the towel in because he could not stand the way people treated his car, he had to constantly watch people because they would disrespect the car, they'd try to sit or lay on it for photos or be tools in the back. Wasn't worth the stress he reckons. Just something for you to think about.