Years ago, when visiting my parents house outside Pittsburgh, PA, we could see into a neighbors basements sliding glass outside door as we both shared a view across a small valley. He had middle school boys who were having a great time running a Lionel train layout that had slot cars artfully added through out the layout. The slot cars were getting the most attention. I have always remembered that layout and thought the combination of model trains and slot cars on one layout would be neat and a bunch of fun to keep several operators busy.
Today's (5-29-2020) Wall St. Journal has an article on a $62 Million house for sale in Los Angeles that has a 12 car garage with a lounge and a Kippway race car track layout and F1 simulator. Kippway is named after the owners first name, Kipp of Kipp Nelson and the slot car layout must be a custom made one. I know I can not post a picture of this detailed and landscaped slot car layout as it is not my picture and I know this layout does not have model trains but you can see it on the link below, or maybe copy and paste to your topic or search window.