Depends. Lousy answer, I know. Tell me more about what you want to do ... do you want to financial support a family of 4, or are you looking just to feed a family of 4. Were you thinking row crops or more of a gardening venture? Do you want to totally live "off the land"?
I was thinking in a bug-out scenario after TSHTF.
I’m not sure what the best arrangement would be, but we’d need fruits and vegetables and meat. I was thinking chickens, sheep (for wool, too). And in that situation it would only be enough to feed a family of 4 and perhaps have a bit for barter.
I was thinking of a hydroponic system, but the BOL would probably be in New England, and I don’t know how I’d maintain a stable temperature in a greenhouse through the winter months.