Mine was a shelf-layout that ran between four rooms on the second story. Tunnels through walls and a bowl of spaghetti wire in the attic to boot. What I did was to have it running with three trains when the realtor came to do his initial walk-through. He said, "Keep it." Within about two weeks, we had a full-price buyer (and this was in 2013, when Reno, Nevada, was no where near recovered from the mortgage mess of 2007-2008), and she insisted it stay. I left behind a Z4000, the TIU, AIU, remotes, and a few running stock. The word from old neighbors is that she ripped it out about a year later.
Eyes bigger than stomach?