Wow, did I get some great advice on my layout plans from The Gauge.. Although many said "start small" that is difficult with my passenger train - so.. Based in the input and my needs my current plan is to start large but simple. Full size layout with two hidden reversing loops but just the two main tracks with a couple of crossovers and plenty of room for expansion of operations. Compared to turnouts and turnout motors track is cheap and I will be able to run trains sooner. I expect the expansion to start right after I finish the main tracks but by then I should have a better idea of the balance I want between "towns, turnouts & tracks" for the expansion areas. I plan on decreasing the radius of the curves as I enter and increase as I exit. In addition to a slight entry easement the radius will decrease from about 32.5" at the start of the curve to 28" at the middle of a 180 degree loop. 90 degree curves will be 32.5">30.25">32.5. (1" change in radius for each 20 degrees of turn) I will post pictures of the layout method and results if it works well. I will quietly change it and say nothing if it sucks Here is the starter layout with the expansion areas noted. Please provide some ideas on how the expansion areas should be filled. It is a walk-in "G". Outside benchwork will follow the track with about 3" to 4" of space from the outside track centerline. There is a wall to the top and left of the drawing. It is open at the bottom and right. Entire layout will be on casters and can be pulled out from the walls. The hidden room is made with a divider wall with a large opening so the layout will slide through it. The narrow point between the two loops to the right is about 2'8" (track to track) so I should be able to get a 2' wide walkway. Reversing loops will have sensors to automatically throw the turnouts on exit. The overall track is about 11' x 23.5' with about 11' x 18' visible. Even using the decreasing radius trick the loops will still be about 60" wide so future expansion will most likely just have buildings in the center. The space between the split in the outside main at the top will be a large passenger terminal platform with a small building in the middle.