My wife has an addiction to old antique clocks, and an antique husband fortunately.
Anyway she had a "clock guy" that fixes and keeps them running. On occasion he has to make a clock part. He says watches are just too frigging small for him, so he does not do watches. His workbench always has some cool clock part he is making to fix an client's clock.
I own an 50+ year old stick welder, and a torch. I have done a few simple projects, but I am a total bodge welder. One of my buddies is a professional welder, and owns his own business making custom trailers for oil field and boring equipment. He welds constantly every day, sometimes 16 hour days when he has a short deadline, and the customer keeps throwing money at him.
For the few welding projects I have needed I find it 1000 times better to take it to him, in seconds it looks like a robot weld, just perfect. I take him to dinner or lunch on occasion as a payment because he refuses any money.