Awesome idea. My zip (59718, MT) shows 250 miles away as the nearest food. Definitely as others have pointed out, needs a lot more data to be viable. If you are to take this more seriously, maybe target a single community and connect with local farms, i.e. https://www.strikefarms.com/
You just typed out my comment for me. I tried 59715. I like to cook entirely local meals for fun and Montana has plenty of readily available farm goods for that.