There's plenty of guys that go into the trades (thinking more like welding, machining, diesel repair) that quickly start running their own truck or shop, work for themselves, maybe hire a few employees and make bank. That's what it would likely look like I imagine.

I know a guy who dropped out of HS and did this as an HVAC guy. He bought a house on a lake, a second home at the beach, and built a special garage to house his car collection. After an ugly divorce that cost him almost everything he has rebuilt (but not quite to where he was before). It takes a lot of work but it can be done. As others have observed, it's unfortunately regarded as a low-status option on the coasts