Back in the 60's and early 70's our "family" vacation was to Mexico every summer. I'm talking the "interior" of Mexico, or sometimes even to the Pacific coast. My family was poor, but like Dad said, we could go to Mexico for 2 weeks on $100 and still come back with change. Motel rooms were around $7-$8/night. We would rent a house complete with maid, garden man, and cook for maybe $40/week.
Anyway, Mom took most of our food to eat. She canned cooked ground meat in jars (or chicken), as well as vegetables; we had noodles, rice, we could get potatoes and some other veggies in the local markets. We "camped" in motel rooms and with her trusty electric skillet Mom could make a meal fit for a king! We had a cooler with ice, we ate pimiento cheese sandwiches on the side of the road, and hot meals at night in the motels.
If you have a pressure cooker, you could can some ground meat or chicken too. You just have to think outside the box.