What about a B727-200 aircraft as a home. You set the airplane up on a column and bearing arrangement so it weathervanes.
Define what is considered a “basic” airplane home. This project has all the complexities of a normal home, it will be delivered according to the buyers wishes. Here seen installed on a lake.You will need the optional "Over water caisson structure" in order to do this.
If you want dry feet, build your 727-200 home on a hillside.
Gravity always wins!