It's a bad idea IMO. Most people aren't meticulous like the majority on this site, a car wash is a car wash. They can run their car thru a machine for $5, and don't even realize how much better a hand wash is. I used to detail cars when I was a teenager. I charged $10 an hour, and I'd usually spend 8hrs on a car. That's to hand wash, hand wax, vacumn, shampoo carpet/seats, clean all the windows, engine bay, trunk, wheels, etc... So it was usually $80-$100. Which is more than taking it to a detail shop where they can have 4 latino's attack the car at the same time, use a orbital buffer, and get the car done in 30 mins for half the price. Is it the same quality? No. But the average person doesn't know the difference.