Obviously if you can get most of your food from what's in a two mile radius food costs can be quite low. I made this video to demonstrate something funny in our thinking about "saving" money.
Initially, I wanted to make a video that showed a store where the standard price is for the organic item and then if the customer wants they can have the store inject poison and remove nutrients and give them a 50 cent discount.
If you pause the video at 27 seconds you can see a brief list of what you can buy organic for $1.50 at a chain store.
Money Saving Tips
Buy at farmers markets
Grow your own - buy seeds at food store as food rather than as "seeds" they're much cheaper that way.