The thing with making a living off of the land, is that you've got to either build-up a farming operation of thousands of acres, play the subsidy and land rental game, and pray that the staples market doesn't collapse on you, OR buy 150 acres, and get into some small niche market and affiliated with a CSA program, grow/produce something that doesn't require a lot of non-family (i.e. paid) labor, and pray that your organic produce doesn't get an aphid infestation. Oh, and this should go without saying, but write-off your weekends from February to November – those urbanites love their farmer's markets and pay handsomely for beets just hours out of the ground.
There's a reason why most farmers work off the farm in some capacity – growing **** quite often doesn't pay ****.