I used to be that guy. Top sirloin is a pretty good cut of meat and it costs about 3 dollars a pound I think. You can make good stew out of it, there's some cheap eatin. Takes a can of tomato juice, carrots, onion, potato, and the meat and you have 8 meals easily for under 10 bucks. Pretty healthy, too. The only fat is the little bit from the meat and maybe a little olive oil.
I didn't mind eating the same thing every day for a week