My teenage son is a type 1 diabetic and needs insulin to survive.
Something that I have never heard mentioned, but have thought of, is to keep a supply of those instand “Cold pack” (like for sports’ injuries), and a small cooler (maybe even inside a bigger one). Then just break/activate the small pack, and keep it in the cooler with the insulin. If you stocked up on some (they are sold at the dollar store, but also, in large quantites for cheap on the internet), you would have a very simple way to refridgerate just meds. I’d go buy some today if I were you, and then you’d at least have the peace of mind, that you’d be one step closer, to having a more permanent/workable solution.
I worry about my dad for the same reason. I understand that Jerusalem Artichokes (AKA Sunroots), are beneficial to those with Diabetes because they have some chemical related to insulin in them. They are related to the sunflower, and I am growing them this year, for the sole purpose of helping anyone with diabetes if they have no other options. They grow fast and easily, and you might like them in your yard/garden.
I hope I’ve helped in some small way. Take care, and God Bless.
Most of those little icold packs also contain ammonium nittrate as the cooling ingredient. It has many uses besides cold.