You are assuming everyone has access to such shops.
Nothing like that outside of the major cities here. Perhaps in Silicon Valley.
Business opportunity....
And in Austin, Texas. I worked on such a machine at the Maker Shop there with my son-in-law. Whatever you need, they have the tools and machines. Benders, welding equipment, powder-coating machines, all big scale. Much easier to pay for the rental and access than to own a quarter-million dollar machine.