My uncle just sent me these pics of his garden. He's off to a great start, as usual, in the great State of North Carolina. Check out that red Carolina clay. He runs a produce stand in front of his house and people flock from all over to buy his stuff, which is fresher and cheaper than the supermarket. The thick patch is his mixed greens (turnip, mustard, and kale). I learned to grow them that way from him. Just go through and pick the biggest leaves every day. Soak them in a tub of salted water to loosen the dirt, then rinse with two more changes of water. He turns them over later to do a second crop.
I brought up the monetary costs of gardening in another thread. This particular operation just "breaks even" on costs. He's not making money hand-over-fist (retired with nothing better to do). Each year, he has some money left over but it goes right back into the operation. He has alot of refrigerators in the garage, a tractor and attachments, keeps upgrading the stand, etc. He makes alot of trips to a "produce house" to buy stuff that is out of season for his garden. You've got fertilizers, seeds, whole plants, pesticides, fungicides, tons of water, bags for sales, trellises, fencing, string, and an enormous amount of personal labor. His neighbor runs the stand in exchange for meals and getting his yard work done and my aunt does alot of picking every day (their kids show up once in a while to help). Otherwise, he'd have to pay for that labor. I just don't see gardening being very profitable or money-saving these days. Most of the farms have become huge commercial operations where they make money on sheer volume with a low margin.