Learn to do more than just one thing.
People will always need stuff fixed. Cars, lawnmowers, guns, appliances. I see that auto-repair shops are at a flat-rate for labor of $65/hr and up...
People are always gonna need stuff hauled. Moving across town. Loads of gravel.
Some lawn-guys are grossing around $100K a year.
At least learn how to run a backhoe, even if you don't go into the business. Good operators aren't that common. Same for other "big stuff".
Learn to weld. You can find all manner of home projects you can do yourself, and do some neighborhood repair work from time to time. "Extra cash" stuff...
And pull in your horns on your life style for a while. Nobody ever got hurt by staying home, reading books, and saving their money. And working in the garage on home fix-it projects...
, Art