I would tell them to research the specialty crops in herbs and dried flowers because the markets are really booming. Also look at niche markets and organic produce, particulary near the urban areas. Be prepared for very hard work without much recreational time during the peak season, and for some disappointment when Mother Nature slaps you in the face. If it's truly in your blood, these things don't matter so much and next year always is going to be better. In more traditional farming, the cost of equipment and labor is staggering which will do in many farmers.
Good workers are especially difficult to find.
I never expect anyone to work harder than I do, yet they don't last very long. Taxes are another huge hurdle because you will be punished for working hard. I would love to see the elimination of farm subsidies, and real tax reform which will allow us to keep our own money and reinvest it in our farms. Well, one thing is certain. If children are going to learn by example, we'd better give a lot more support to the farmers and farm workers we already have.