We are on the road all the time, we have no residence. Most RV parks will not let you wash your RV. I have used truck stops that charge from 75 to 125 dollars and do a terrible job. What do most do?
I use a bucket and do a small section at a time.I don't use a hose to wash and rinse. I have never had an issue. It does not get the best job but certainly gets the worst part. Having someone wash it can be very expensive as mentioned.