I would say it is a scam, if I was getting major surgery getting my car detailed would not be high on my list of urgent matters to attend to. I would ask to meet him at your local police department parking lot to discuss details of what he wants done. Explain that you like to see the vehicle in person prior to making an estimate and have him and the vehicles meet you at the police station. If he can't prove beyond a reasonable doubt that he and his vehicles are legit I would be very cautious about this. I hope this helps!