Big mistake. A better title would be, "How to sacrifice you health for money." No thanks. I can be cheap with a lot of things, but not with the food I put into my body. The kind of diet OP proposes may work OK for a while. The younger you are, the more resilient you probably are, so that can be quite a while. But sooner or later, especially if you're a little bit older, you will be trading quality of life for a few b…
I'm not advocating anyone goes near as far as I did, but something to keep in mind for that friend that eats like shit out every night spending 10x what you could by making a healthier option at home.