I'm a Black Sheep< On30. and recently had to tear my Narrow Gauge down, Had to move. It was built in a 10'x10' bedroom . on a frame that was 24"s deep . as far as track plans pick up a copy of 101 Model RR track plans ( or any ho track plan) from Kalmbach publishing, and if you are on face book , there are a bunch of us . ( good people) Just remember This is still O scale on HO track and The buildings are bigger and you will need bigger clearances on the sides and over the top. with 18" R you can run most every thing that Bachmann makes, but some of the Brass On30 takes a larger radius