Geo, first of all, good for you for coming here asking for advice.
Secondly, go to the grocery store (wal mart, costco, sams whatever) buy a lot of their chicken which is cheap and buy a big bag of rice. Don't over complicate this as Queefer said. Cook the chicken and rice on Sunday, divide it up into tupperware for the week, and when you get hungry, EAT. Buy 20lbs of chicken breast ($40) and see how much you eat in a week. You will probably have some left over. Buy some of the egg white cartons (about $4 each for a 32oz) and have that for breakfast along with oat (again, very cheap).
So, you'll have a lot of chicken for $40, probably go through 5 cartons of egg whites ($20) and a bag of rice ($5). So you've spent $65. You'll have some $$$ left over to buy some steak and veggies to mix it up. You can eat great for cheap man, you just gotta be smart.
Good luck buddy