I lived on a boat for 4 years. Yes, indeed, I loved it. But you have to sort of double the square footage since you have the entire deck and the staterooms and cabins below deck. In addition, you have a significant amount of dock-space and ‘lake-front’ property, so-to-speak. All of which makes your effective living space feel much more expansive.
I wonder if it’s a Karl Farbman design?