A land based option

Another maybe option, though Kay isn't too hot on the idea, is a more traditional RV.  Either a motor home or travel trailer.

Either one gets lousy fuel mileage, but I'm not thinking constant travelling.  I'm thinking a trip to a location, and rent a space or maybe even buy some land and park for a while. If it get cold in the mountains, head to the beach.  When the hurricane season rears it's head go inland.  In the heat of the summer, go taste the cool mountain breezes.

The motor home would allow towing a small boat or economy car, but like any vehicle, there's only so many miles in the drive train, and tires and such are big $$$.  The trailer would need a tow vehicle, probably a large truck.  Still bad mileage when towing, and not great with the trailer disconnected, but when the truck dies, it can be replaces cheaper/easier than a motor home.  I also suspect that a trailer with slide outs would give more space than a motor home. I wish the rental places would rent tow vehicles.  Then I could rent a vehicle for the couple time a year we may want to move the trailer, and they rest of the time drive an econobox.

Probably a pipe dream anyway.  A lot can happen in ten years.