If I had 5 by 7 area, I would use 054 Fast Track Oval, add two sidings, and Houses, streets, buildings, cars truck, lights, crossing gates, Small Engines, Atlantic's, GP 7's,
GP35's, Ten Wheelers, small engines, short trains, planned well. This would be Fun.
This is how the Fun and Art of Model Railroading Begins, Dreams Come True.....