very impressive. i don't have the time nor the patience but if i have to build a building, i would probably consider building a diesel works or the "the works" with the sliding track
My Trackmaster/Tomy/Plarail Photo Gallery Page (over 600+ photos and still under construction)
https://www.flickr.com/photos/183311600@N03/
https://www.flickr.com/photos/183311600@N03/