Most Bay Area homes have tiny yardsif they have any. So I've always assumed that when we get a house, our garden will supplement our farmer's market purchases.
Then I read this article in the Chronicle, about a family of four that grows 3/4 of their food on one-tenth of an acre. And it's organic. So they also run an organic food business, using food from the same garden.
Those tiny plots of land in Bay Area back yards don't seem so limited now.
Thanks to The Ethicurean for the link