He sounds very friendly and mature. I think he's dropping hints. Have him detail your car and see how that goes. He may even open up more about the odd jobs. If not, when it's time to pay him for the car detailing invite him in and talk to him. Be upfront and honest tell him you saw his profile on RM and are interested in some if his other services. Maybe just mention a massage or something. It will then be up to him to make the decision. If he says no, leave it at that and respect his decision. If he says yes, just be very discreet. If it were me I'd rather ask about it than wonder about it forever. If it's meant to happen it will. Good luck!