I've had the same thought. I've thought of a couple of business like that. One is to start a commercial drone service, and the other is installation and customization of more serious "intelligent" alarm systems that include outdoor sensors. I'm relocating out of the city to a much more rural area, where I think there may be a market.
I also considered buying/selling precious metals, although that presents certain security challenges that I've had trouble working out.
If you are “good with your hands” on any blue collar trade you should be fine almost anywhere.
I did not have those skills—and always wished I did.