Accepted to kllm training

I have been accepted into the kllm driving training and I have some questions for current drivers. I was reading that inverters arent allowed and I got wondering about keeping food so I wouldn't have to stop and eat out all the time. I see coolers that plug in but they only cool to 40 below the outside temperature. Does anyone know how to store food without an inverter or if an inverter is allowed. That one policy kind of bugs me if it's true

 

How does it do in really hot weather? I can do the cooler and then just get a small freezer for my meat and other frozen items

 

Im concerned about keeping meat and other frozen goods in the cooler. Unless im mistaken they only cool to a certain point. I can get a really small 11 quart freezer from dometic for like 350 plus the cooler that would be like 450 invested and i could store meat and other frozen goods in the dometic and the milk, left overs and everything like that in the cooler

 

Ok so I remember my uncle telling me that he would stop once or twice a week at a walmart or grocery store. He'd just buy a little meat and cook it that day. I can get a 60 quart dometic or whytner but I think the little 11 quart freezer and a small cooler would work.

 

Ive came across a few options. Option 1 is too buy a whytner or dometic for 700 dollars that has both a freezer and a refrigerator compartment with two separate temperatures.
Option two and the cheapest option buy a small dometic for like 300 to 400 ranging in size from 11 to like 24 quarts. Then the coleman powerchill my uncle uses and he said its like 75 dollars at Walmart and most truckstops have them. Id save close to 200 dollars that way