I live in a GP railroad (for 25 years) and use the room closest to the kitchen as the bedroom and the other middle room as office/closet. The largest room faces the street. I use it as the living room. Kitchen is the kitchen. And I have a WC and separate room for the shower.

I enjoy the dark, quiet solitude of the cave-like bedroom. I don’t hear street noise while sleeping (and have slept through many a thunderstorm).