That sounds very cool...I have talked about doing something to that effect also with my wife once one of the kids leave and stay left..lol they keep coming back and she likes to keep a spare room for guest. I was wanting a car room to display my models and do it in a city type setting. Or just make it into a train layout room. I used to have a layout long ago and making scenery and building and detailing builds was always the fun part of the layout. and with G scale being big now there is kits and scenery stuff for doing the cars. But be ware....she might want to double the size of that garage you were talking about after she gets you going on the room!!! The ladies love their sewing and crafting hobbies!!