Any meat is better than no meat. I.e. even the cheapest, crappiest meat is going to be better than pasta or candy bars. You should check out costco and other bulk supply places. They often have low priced meat of average or better-than-average quality. You might need a mini freezer to keep it all, but they're a great place to get conventional meat. They even have frozen, pre-cooked meat if all you have is a micrwave.