I suggested to Rose about getting a fifth wheel or motorhome. She is not game, she thinks she couldn't operate it properly. ?When we bought this house in 1994, it had solar hot water panels. They still work today even though no one installs this type anymore.
We take solar panels with us when we go to a campground at Lake Powell, & run off stored battery power at night unless we need air conditioning--then you need generators. We have a 2002 bad *** 5th wheel with 2 air conditioners, but then you have to run off generators & turn your generators off at 10:00p. So it's nice to have battery power to run fans at night, if I don't keep the tv on all night.
Cost-effective is something solar is not unless you're off the grid.