My layout is only 4 x 12 to begin but I intend to make it 8 x 12. I intend to add a staging yard along the side of the wall and along the other side down more some sidings and industries. I also intend to do a backdrop to put all around the main layout. There will also be a hidden loop of track coming up into a hill that will be suspended. My goal is to fit as much layout as I can into a 100 sq foot space.