Inherited seems quite possible. Historically a lot of trades were family businesses. A son or daughter may have come up through working for the family shop.

A possible alternative path is to take over management of a business from its current owner, and eventually buy it out. Also, just a little bit of seed money might make the difference, e.g., buying a van full of basic tools is expensive, but it's not SpaceX expensive.

I've hired workmen who turned out to be "a couple guys with chainsaws and a pickup truck." So it might be possible to ease your way into a business by starting with smaller jobs.