Welcome to the forum.
I feel that if the RV has room to install the Liberator safely then that would work. And it would work in anything you move to.
Pay close attention to stove pipe installation and height, closeness to the wall and what kind of base the Liberator is placed on.
As to your last question about other solutions could be a regular
wood stove, a propane space heater, electric space heater like Mr Heater, etc.