I would not want one at all....not just the weight and power and water consumption...but the inconvenience.
My wife and I were full time for a couple of years and often travel for months now. We long since solved the laundry issue. Once every 3-4 weeks we do laundry. It is easy to find a decent, clean, inexpensive laundromat. We load up usually a half dozen washers and then dryers and complete the entire chore in an hour or so.
Getting by with laundry every few weeks is easy. Even at home I have at least 30 underwear shorts, pairs of socks and pocket T-shirts. That and extra sheets, a couple of long shirts and a couple of pairs of pants or shorts is the bulk of what gets dirty in 3-4 weeks. I would not want to be messing with a tiny washer dryer every few days. I would rarely have the water or electric hookups needed.
Everyone travels differently. Personally I like a relatively light and relatively small RV. I travel lots of miles, stay in remote locations and certainly want a rig small enough to at least handle some unpaved back roads. I almost never stay in a campground with hook ups.
