There are a few with different brand labels. I never did find a table top unti.
We bought a small one at Lowes for a bit over 200.00. It does shut off when the one gallon tank get full. It stays off while you empty it and turns on when you insert the tank again.
It should have/may have a connection for a standard hose end so it can be left running until it reaches set humidity level. Some dehumidifers have been recalled due to fires. This unit runs all the time, in the basement, when we are home now. Have to buy another for the coach.
I would place it on a board, of which I can't thing of the name right now, designed for small stoves to be put on and in the middle of the coach, just for peace of mind from being away from the coach for a long time.
It should be fine. In two years, continous use, this unit has given no problems. It does have an air filter that should be checked or changed once in a while. Ours needs to be cleaned after two years, probably.