Then I end up in the DIY section, and for about ten seconds I think I hit paydirt. Then I realize that every. single. video. is by some guy who knows his way around an arc welder. And not like "This video is for people who know how to weld," just, "okay cut these pieces and then you weld em together and then you're done." Like everyone or their brother knows how to weld.
Now I bring this up because clearly there is some subset of people who are saving a great deal of money by making specialty tools out of stock or scrap instead of buying it. I know a bunch of amateur carpenters and a few woodworkers, but didn't think I know any amateur welders.
I don't know if its a time and place thing where those skills were more relevant to a rural farm boy in the 60s than they are today, or just that such people still have those skills, but I'm just not one of them...
I currently feel comfortable doing basic home plumbing, electrical, my own auto maintenance, building small pieces of wood furniture, and light metalwork (bending, drilling, riveting, etc). Next up that I’d like to learn is welding and fiberglass. With so many resources out there for free, your only limitation is time and access to basic tools.
When the commercial offerings are $100,000+ but you can make something good enough yourself for $20,000 or less, well, yeah, it is well worth it to take the time to learn welding, since you will more than make up for it with just one such project.
That's how/why my grandfather knew how to weld. And all his children. And his grandchildren too. His kids all went to college but also got a big boost from having practical hands-on skills to augment with theory and specialization. One of my uncles got a PhD and then spent most of his career helping grad students fabricate equipment for their field experiments, because hardly any other students or professors knew practical welding/soldering/instrumentation.
Hire one and have a go on any 5mm+ steel job you have and you will likely surprise yourself.
The inverter welders are also way easier to use (and portable) compared to the old school transformer welders (i.e. don't buy a second hand transformer welder unless you are a hipster).
Now, this won't make you good enough to weld on a bridge or an airplane, but you'll definitely be able to stick metal together for doing one-off stuff at home.
It's the same as in software: All those people who think they know how to do programming because they can whip up some shitty python script. But that's the easy part. Making an application that works superficially is practically trivial. Making something that is proven to work, that scales and will still work in 10 years is where the money is.