Bus had a little bathroom that was kind of like an airplane bathroom. It wasn't horrible but it was in the wrong place. Since bus is so narrow, the only way you can have a king size bed is if you put it at the back. Otherwise it is just to wide to pass. Bed is 76" and interior width is 88", so it leave 6" each side.
Before:
During (bathroom parts in foreground, rear AC removed):
And after!
The good news is there is nothing obstructing placement of the bed at the far back. And the back wall has a little slant so it will be good to build a headboard right against it.
I think I have decided to keep the existing toilet setup but have it sealed and under the bed compartment. That way I can still use the retention tank and drain system that is there. It is all high quality stainless steel so will function well. I can do this because I will be using a macerator toilet that can pump effluent upwards. Normal toilet would need to drain through the floor.
This toilet is pretty cool. Ideal for a basement bath. Also ideal for use hear as it grinds waste and feeds it through a 1" pipe. I also especially like it as it is very short front to back with no tank. It will sit in the bathroom that will be just in front of the bedroom, a pretty short run for the plumbing.
The Saniflo 023 SANICOMPACT 48.