“I think a large bag of rice, dried pasta, and some flavoring are a great investment.”
I’m not much of a carb man, to say the least. But I do have a doomsday qualifier - when things get really bad, then yes, you eat carbs if nothing else is easy to obtain, and yes, they’re far cheaper than any other food (as far as cost per calorie). But you still need some meat for the long-term, or you’ll get killed on nutrition. So do look into options there (and there are many).
A suggestion in the face of carbmania. Eat once a day. That way your pancreas can rest and recover. It won’t be as harsh on your metabolism that way.
I have meat, veggies and fruit in the freezer. Added some frozen juice. The rice and pasta are cheap simple insurance that don’t require refrigeration - though they do require water.