Are you going full time? If not, don't bother.
We full timed for two years in a DP with a washer dryer combo. The loads were very small. We basically had to wash clothes almost every day. The cycle time is 4 or 5 hours. It was nice to go away and come home to clean cloths. It sucked to do a load while camped and have to listen to it and put up with the vibrations.
Now, we go out for a month at a time. Once or twice a month we will load up to or three RV Park washers, then dryers, and do all our cloths in a couple hours. This might be a better way to go, unless of course, you are full timing.