Are you talking setting up a truck washing location off the side of the highway. The trick would be getting truckdrivers, the miserable people they are, to want to use you to clean their trucks. After you did a few, and got a couple of guys talking, it might work out. You would be surprised at the number of small companies that do not have a fleet washer come on their property because all the trucks are out at different times. What you could do is target an area, and get with all the fleets to have their trucks come to a centralized location for washing. I know that there are a couple of contractors that do this, and seem to have a steady revenue stream from it. Have guys come in, have their trucks washed, then just bill the office.