Dan,
Pretty cool. My other hobby is model railroading as well. I run N scale due to space. My layout is 12X9, around the walls with a center peninsula and unfortunately, two liftouts for doors. Just started putting it together in November. Was finally laying cork roadbed this weekend. You're much further ahead than me. My son is into it, too. Great father/son time. I grew up around Santa Fe, then BNSF and now live next to the UP line. Can see the trains from our second story.
Nice job on the dealership. You should run a siding to deliver tractors and such. I think we need some more pics of the layout and vids of trains running. Are you running DC or DCC? I'm gonna go DCC and use the NCE PowerCab throttle to start out with. Thanks for sharing.
Under edit: Saw your vid. Nice layout! Love the steamers.