Dave - We're kind of big into Legos in this house. I still have all of mine from when I was a kid, including the first Lego train set (3 C battery power on the blue rails, vintage 1968). What you see in the photo is just the tip of the iceberg. The slat-wall was acquired in a "dumpster dive" when they were remodeling a space at a local strip mall. It was a bit spendy getting the bins for it though, still well worth being organized. I'm sure you know what it's like to look for a specific piece.
Spence - The house is an L shaped ranch style with a full in ground basement, footprint 4450 square feet up and down for a total of 8900. The train room is 1900. When I designed the house I started with a 40 x 100 rectangle then added a 15 x 30 bump out to make the L. I want to say it cost about 400 to build, but I was the general contractor and had a ton of sweat equity in it. It isn't filled with fancy finishes or even a lot of rooms. However, the rooms that it does have are rather large. Go big and stay home. Works for me.
Brian - Thanks, but if you are referring to the whitewashed oak entertainment center, that's just a store bought set from the late 80's. They don't even make them like that anymore, since the demise of the cathode ray tube. It has truly become a white elephant and I would love nothing more than to be rid of it. Unfortunately, I think it has about as much value as the mountain of boxed MPC trains in the other photo.