Maybe so. This last one I think was a Sam's Club special 20 years ago and has had the piss beat out of it ever since.
Yea, nothing beats a commercial gas powered washer for cleaning concrete.
The motivation for an electric with a cut-off switch is for getting on and off ladders or scaffold or to stop and scrub a spot. I don't know how long you can let any of them idle and I work alone so...
Thanks everyone for your responces!