Well, it came to me while I was in the room where I do my best thinking.
I have wanted to see how small of a caboose I could make. Maybe 10 feet. Not just an outhouse on wheels, but a multi-functional caboose. So I grabbed the closest dirty napkin, and then the ink ran!
The words you can’t read are ladder, folding seat, folding desk, and I think combination seat and Portapotty.
I’m off and running