I don't know why this sticks out... but years ago, I played poker with a husband/wife. They tell me that they have a business building model trains.
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I thought this was a "Curious profession." The team tells me that they have a small group of clients, who are mostly older and extremely wealthy, and these elaborate model train sets that they build takes their older clientele back to their childhood.
At the time, the guy said that he was working on a train set for a guy that cost well into the 6 figures and that these setups could take up an entire room. He said that one model train project could take up to a year to complete, because it's all hand crafted, hand assembled, everything is one-of-a-kind.
In my opinion, it sounds like the model train community is a big --> measuring contest and retirees with big bucks will spend whatever to have the best train setup. That was how I perceived it. Not different from any other hobby that people take seriously.
This was just a world that I didn't really think about existing, but it makes sense that you could make big $ with something like this.