That brings up a good point Benjamin, the swabby and the Turbo Twister are motor driven spray bar surface cleaners which are able to clean large areas of concrete fast.
The factory that built the Turbo Twisters burned down unfortunately but I have a contact over there to get parts if needed.
The guy building the Swabby is not building them anymore for many reasons but that is an incredible machine.
It would be nice of a vendor started making a Swabby-like drivable surface cleaner, with lots of guys cleaning huge areas of concrete like shopping center parking lots, parking garages, stadiums, etc.... I think there would be a market for them still, if not even more so.
It is all about making money and being efficient, if you can clean faster without increasing your expenses too much, you are making more profit as you clean more concrete faster and faster.