There's currently a serious glut of lawyers in the US market, and not just in LA and NYC. Sure, graduates from Harvard Law and its peers are going to have an advantage, doing high-end corporate law, but news articles I've been reading recently say that for average-quality law students at average-quality law schools, some ridiculous amount like 1/3 don't have a real law job within a year out of school, and the pay scales don't match the level of student-loan dent they have to pay off for most of them. A lot of the entry-level jobs are things like public defenders (get paid dirt, heavy case loads), or small-town business/real-estate (plumbers get paid better.)
And farming? Are you kidding? Americans may have a warm place in their hearts for farmers, especially if their grandparents farmed, but their grandparents got their butts off the farm and moved to the city for good reasons. And that was before mechanized agriculture radically changed the number of farm workers it took to grow food, and pushed us toward monoculture agribusiness that needs maybe 3% of the US population to grow most of the food, and most of the farm labor is low-paid migrant work. If you inherit some land or are willing to move to a dying town out on the prairie, sometimes you can make it pay off, or and there are some places you can do specialized-market farming and do ok at it, but it's tough work that won't put your kids through college.
Corrections? Yes, the US has far more prisoners per capita than China or even Soviet Russia used to, and until we end the drug war and have some time for its spin-off crimes like the gang business to die down, it'll probably stay big business for another few decades, but most of the work is morally about one step above being a slave-owner and financially it's two steps above minimum wage, competing with a labor pool of people who need a job that doesn't require an education, just a mostly-clean criminal record and adequate citizenship papers.