I fully believe that what you are hoping to accomplish is not only possible, but is what we really need to do with our entire food system. More localized, many less petroleum miles, carbon sequestering food that enhances the environment instead of poisoning it. I think that the Savanna Institute http://www.savannainstitute.org/
is a great place to start, also as others have mentioned, Mark Shepard’s New Forest Farm is both an example of a 25 year old, +/-100 acre food savanna in Wisconsin and a great business model for such a system. I recommend contacting him, I believe he does consulting work as well.
I think that multiple smaller food savannas give much more resilience than one huge farm. By smaller I don’t mean 1000 little 5 acre farms, but small like 100+ acre farms instead. This is important with the unpredictable seasonal weather that is becoming much more common. For example, a smaller farm in the northeast may be hit by a late frost that wipes out the apple crop, however another smaller farm 100 miles south is completely safe from the same frost and has a bumper crop. If you have one 750 acre farm instead you could lose the entire years supply of a crop for various reasons, but 3, 250 acre farms you stand a much better chance of not losing an entire crop in a given year.
I have dreams of feeding my entire island community of approximately 2500 people with food systems like these, it is not something that can happen over night, but a long term 20 year plan certainly could.