1. Get protein from non-meat sources. Consider, in particular, eggs. Monitor the sales at your grocer of choice; if they have a free loyalty program fill out their form and take their junk mail to get in on that.

Also consider protein powder. On a per gram of protein basis, whey protein powder is only slightly more expensive than eggs, but much easier to prepare. (Assuming $25 for 5 pounds of whey protein powder, and $1 for a dozen large eggs, I get $0.0156 per gram of protein for whey, and $0.0132 per gram of protein for eggs.)