This is a absolutely brilliant idea and from a bug out perspective/ Two of these units could be made in a acorn shape and loaded on a simple flat bed trailer. I say two because one could be used as a kitchen / bath and the other as a bedroom. With a bit of enhanced creativity they could even be camouflaged and with a simple winch or block and tackle placed in a treeline and used as a temporary retreat or emergency bug out.
The main advantage I see is portability and even in a stable economic environment I can see this design as being desirable for vacations, wild life observation and if portable like a trailer fitting into a hole in the building code for people buying new properties that need time to build a new home.
Kudos Joel Allen for a awesome idea and wonderful craftsmanship