That is a great idea Ron. I have thought that there is a way to make one that is a lot less expensive than what is available right now.
The only thing I would want is that to make it small enough so you could do most accounts and not need a huge water tank for supply.
I don't mind having a pressure hose going to the machine for supply or dumping the recovered water occasionally but to have both on the same machine would be hard.
What amount is recovered with evaporation and absorption, maybe 60-80% ?
My rig uses 5.6gpm and my old 325 gallon tank would last around an hour without more water going into it. A highter volume machine would use more water even faster but you would need a Zamboni sized machine to store that much water. Eventually you would need to stop for more water.
What I would like is a machine that is connected to the pressure washer trailer for pressurized and/or Pressurized hot water and what is recovered could be filtered and separated for re-use back into the supply tank on the trailer or sent into the sanitary sewer. This way you would only need to propel it and a recovery system on it. If you were doing very greasy areas, you would need a burner on it and would take up even more room, that is why I would like the pressure washer on the trailer.
You could even have a small tank with a pump to pump out the recovered water to the trailer and just tie that hose together with the pressure hose so they are bundled together and the machine could be even smaller.
I was thinking about 40" cleaning path with the vacuum recovery built in so you could do big parking lots and not even need to rinse, except at the corners where you would need a wand to cut-in or when you are too close to obstacles like poles or benches.
If you wanted to take it a step further, you could have an engine propelling the spinner bars like on the Turbo Twister so you lose less energy on turning the spinner bars and focus all the energy and flow to the cleaning only.
