My Grandfather has a set about x2 bigger than this in HO scale, in his basement.
He has a little town, railyard, lumberyard, Amtrak railway, ect. It looks really cool.
I was leaning more near N-scale because of the small space I have, but I dont know yet.
I might do N-scale for now, and HO-scale when I get more space to build. Not sure tho.