If you have an Asian or Indian market nearby, you can buy rice in bulk and sometimes cheaper and or legumes.
Perhaps, invest in a good protein with vitamins powder so you don't wound up with nutritional deficiencies and get sick which would impact your way of life currently.
You can grow several varieties of plants in planters if you have a place in the sun for them; seeds are cheap, I suspect you'd have to be creative with the containers and soil to put in and find it around to dig out or have someone donate it to you; perhaps you could pose this question in the Organic Gardeners SP Team.
I wish I could be of more help; I lived on macaroni and cheese for 2 years pretty literally while in grad school so I feel for you.
Edited by: GARBLEDEEGOOK at: 4/19/2012 (13:11)