1. Buy several bags of chicken drumsticks (de-skin if you want to lower fat intake), poke holes with a fork, marinate with wine / vinegar / soy sauce / herbs and spices for a few hours, put into broiler. I'd cook 30 or so at a time, and it'd last me days.
2. Ham or turkey or peanut butter sandwiches.
3. bags of frozen veggies. Stir-fry if you have time, boil or microwave if you don't.
4. Peanut butter & banana & milk & protein powder drinks. I'd make a big glass every night for my snack.
5. Mixed nuts to snack on.
Lots of good fats, low glycemic index carbs, and protein; inexpensive and quick.