Have you ever thought of changing from automotive mechanic to a diesel mechanic, or even a fleet mechanic? I'd say try to work for a municipality. When I graduated tech school with an ASM degree, I said I'd never work flat rate. I got my first fleet job at 21 years old, and then moved onto another job a few years back. We take care of everything from upfitting million dollar prices of equipment to working on a chainsaw. And the pressure, stress and pay is all the same. I live in Washington so the pay here is really good, not sure of your city, county, state, public power, EMS/firefighting agency's pay, but her they all pay premium. We have a fleet of over 1,000 so nothing is the same, you have knowledge of automotive so your skill set it sufficient if you want to learn heavy diesel, equipment ECT. The kicker is most will pay for schooling up to a certain amount per year, as long as it pertains to anything that the municipality employs... I take a quarter every year of fabrication, cnc operator, or last year I did aerospace fabrication (aka fiberglass and carbon fiber). All paid for. You might just change fields, and not whole careers, put that college degree to work. And learn on someone else's dime what you might want to do.