Healthy food is cheap to make and if you know what you're doing, you can make it taste good too.
If you have a target nearby, they have packs of six large chicken breast for under 3 dollars per pound. I like to trim them up and bread them in panko mixed with ground pepper, oregano, rosemary, and paprika. Then, you just fry them in peanut or corn oil. Super cheap to make, tasty and very healthy.