Ted I'm sure you know but the urban gardener 'could' plant for food 'if' they had the space. All you would need is a way to catch the rain which could be barrel or any sort of container and really any size. This is really the best water for your garden anyways.
(form "The Green Gardeners Guide) For every inch of rain that falls on a catchment area of 1,000 square feet (the typical size of a roof) approximately 600 gallons of water can be harvested.
This is something you should think about OzarkLady if you plan to go big time, let mother nature water your plants as well as store up her reserves.
I do envy all of you with lots of land and big farm plots. We just moved where we did a few years ago. It is NOT what I wanted but better than where we were. We looked and looked for (at least) 3 acre lots but just couldn't afford it.
Heck we couldn't even find one with a wooded lot back lot in our price range. So farm on and and plant something for me please.