There are several self service car washers around here, the closest one 1.x miles has a high bay with catwalks for doing large vehicles, that's where I take my Bounder
It has spray wash and long handle wash brush,
Brush wash then spray to rinse, Not necessary to spray along window caulking with high pressure, to get a good rinse, by the time I've finish washing 36 ft of MH,it cost $12-$15, Brush washing takes longer than using high pressure spraying, so more quarters in the money box, and it's about $3 a pop for 8 minutes?, been a few months , time to go again, it's dry for the rainy season and mother nature isn't washing it for me