Floor plans ~ skip the wall and just do a sleep nook in the corner and enclose the bottom end with a "built-in" closet. The bath area could be a "wet-room" meaning the entire room is the shower. With rustic wood floors and a wood or propane fireplace, this would be a terrific space for a single person like me.
Saw this o Tiny House. It's a floor plan cracker cabin. Someone commented on the door being on the side of the house and that it opened up the opportunity to have a bit more space for living. I think she was onto something... If not on the side, in a corner instead of centered would also make sense I think. **Would be great for my mother in law