They grow their own beans, they always try to pawn a bunch of them off on me. Mostly shelling beans. they don't do green as far as I know.
And yeah they have power but a normal green house in southern Georgia (like in this show) would be the equivalent to their heated green house they use through the winter.
I'm not saying these people aren't crazy or anything because they are. In terms of strictly nutritional needs they only eat what they grow. They have Apple, Pear and Cheery trees as well along with some grape vines. Some new neighbors moved in a dew houses down and they two families got locked in a legal battle over if the hippies should be allowed to basically farm in their front yard. They have no water system set up, they just use their outside hose to fill watering jugs and pretty much tend their stuff all day long.
They also have this arc thing (best way I can describe it, looks like a mini noahs arc) that has some chickens in it. -shrug- they seem to do well and I know for a fact they only eat what comes from their property. -shrugs-
Anyway, my argument was you don't need a football field per person.