I was talking with my basement zoning commissioner the other night and potentially have the go ahead to secure 24"ish of right away around the perimeter of the basement.  This is both encouraging and frustrating.  I recently completed construction of a layout room that is 18' (the width of the basement) by 19'6".  I have a two deck plan that is around the walls with a peninsula up the middle.  The challenge here is that there is no more that 12' of straight track and curves take up a lot of room.

This is the GS&M track plan for now.  I do not have the transition level or the staging yard track plan shown.  both not very exciting to look at.  We do have Red Mesa Mine and Knot Mine on the transition level as it pass around Noose aka Transition level.

The 2 track Main Helix runs from the stage yard located under the lower level up to La Grange.  The Main Helix is used for getting trains in and out of staging and can be back filled with trains during operations. Inner loop is down, outer loop is up.

Ok, here is another pass. Clockwise from left. Staging (Bethlehem), comes out of the Perkasie Tunnel, splits to a two track main. Siding that splits for the team track (which had a gantry crane) and the freight station. Perkasie Passenger Stn, and then the siding for a coal distributor, a feed mill and a place called Mt Alto. Then on to Sellersville and Lansdale. I will reserve putting a bridge across the door way for continuous running as the "Board of Directors" would have a fit with that.