Check out this ultimate urban farm! It's the ultimate settup for such a small space. Apparently they raise animals and grow enough food to feed their family of 4 adults and have enough left over to sell, all in 4000 square foot yard. That's appoximately 50ft by 80ft. If you haven't seen this video yet, take a look. You can check out this families web site at http://urbanhomestead.org amazing!