I can repair old machines, I started last year and have done a dozen or so. Does that mean that I should start a repair business for old machines? I don't thin

I can repair old machines, I started last year and have done a dozen or so. Does that mean that I should start a repair business for old machines? I don't think the economics make sense for most machines; sometimes it takes less than an hour to "repair" an old machine, but most of the time it takes a long time to diagnose the issue, especially when looking at a machine you've never looked at before. Even at minimum wage, it would sometimes end up costing more than paying a little more on ebay to get a machine in working condition in the first place. I've been thinking of maybe starting a rental service for vintage machines though. I imagine that most people just want to play around with something for a couple days or weeks, and buying and then selling is quite a lot of effort I imagine. (However I wouldn't like sending known working vintage machines using regular delivery services.)