I’ve only just begun modeling the interior so it’s looking very rough, but this will give you an idea of the layout that I’m planning. With the many constraints that I’m working with, this is pretty much the only viable layout. The driver’s seat has to be accessible from the living area, which means that the bed has to be in the back. I’m uncomfortable blocking the side door, which means that the sink and the refrigerator have to no place else to go but directly behind the driver’s seat. The feng shui seems a little funky (not that I know anything about feng shui), but it’s the option I’ve got so I’m going to run with it.