I don’t really do map rooms in singleplayer since I tend to spread builds over a large area, larger than would be feasible to fit in a map room since I would have to fill in large areas I’m not using.
Plus the fact that it can be a pain if I build a lot of stuff since I’d have to update them to include new infrastructure.
I am thinking of making one though on the Server I play on though, since they can help people find stuff more easily.