This article and a lot of the discussion fails to make clear that there is a big difference financially between being a plumber/electrician/hvac tech and owning a plumbing/electrical/hvac business
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It seems to cost about $10 to 50k to acquire the tools, vehicle and licenses to start a plumbing business. Is there something else that’s substantial beyond the normal attention to detail and savvy that every small businessperson must have?
And now that I say it: hospitals need electricians too. Electricity goes out in a hospital for too long, lots of people die.
And actually a third point: electricity -going out- is not the only thing that could kill a client, it's not too hard to start a fire.