In the early 2000s I had the good fortune of being employed by a well known model railroad builder. I spent most of my time on CAD, module construction, track laying, and wiring, though I also worked on scenery to some extent. Many of these layouts were quite large and took up to 2 years to complete, which when finished, were delivered using semi trucks or multiple trips with a U-Haul. In 2007, that company moved out of state, affording my sons and I the opportunity to start Trackside Layouts.
In the real world, I am a volunteer engineer at a local museum, operating a 100 year old 3 foot gauge 0-4-0 Porter tank engine. It runs on the weekends and I have a great time sharing that part of our area’s history with our guests. Incidentally, in HO, our little line just fits on a 5x8 foot layout.