Small washing machines?

I posed this question on the Class A site and it was suggested I try it here. We do not have room for a standard washing machine or even the smallish Splendide front loader...I wish! My wife has been looking at various portable machines like the Mr. Heater model. Need something that will work either sitting in the shower, or on the kitchen sink. We Winter in our RV and my wife hates the Laundramat, either half the machines are 'out of order', or the rest are busy....then, there are those people who wash their close, leave 'em in the machine, and go shopping....or something. Winds up being a half day, or more, project., walking back and forth.
We have a small 110v dryer in the rear 'trunk' compartment which is slow but works.
Anyone have something that works for them? Bill