JPostal said:Last year I operated a mobile pressure washing company alongside my detailing business and I can assure you that nobody is generating 400K washing cars. Having spent a fair bit of time on a fleet washing forum I would say that you would be lucky to get $1 per car. The equipment you need to efficiently do this work will set you back 10K or more and the quality labour you can afford if you want to make any kind of money is going to be unreliable at best.
I'm not saying there is not money to be made, but it is most definitely not as easy as it sounds. (Just like doing a proper detail is not as easy as it sounds). I offered commercial truck washing and that was OK money but it is HARD work and a nightmare collecting $.
If you are considering this I strongly recommend you join a fleetwash forum before you spend any money on the idea...I learnt that the hard way.
Labor would be the tough part. This type of work would be exhausting and I could see you losing employees every other week. Even if you paid your employees by the car, I still think turnover would be very high and the type of employees who would work for you would be low wager earners who don't give two weeks notice, you just show up one morning and find out you are on your own that day. This may be something where all 2 or 3 guys/gals have some type of ownership in the business to keep everyone committed.
I never thought about the problems getting dealers to pay you but I bet you are correct, I bet it would be a pain.