Wife is optional but there is a small print making "opting out" quite difficult and expensive.
I don't think that washer/drier has anything to do with solar. There no easy way to do this - even if you have W/D installed in your rig - without going to some place with full hookups. Or - to a laundrymat if you don't have a W/D.
Again, there is a way around this, with way less water and zero electricity, I've seen it in Mexican homes, but I doubt that you will want to do it this way, and 99.9% positive that your wife won't like doing it either. But it works. When you have to conserve water - because you just don't have enough - than you conserve.