How to prepare for the worst? Fiancé of T1D in America

The state we live in is right to work, meaning they can fire him for no reason at any time. He has health insurance through work and relies on that to afford his insulin. I’ve asked him about the super cheap “Walmart” insulin but he said that wouldn’t work because of how it is derived?

I’m just curious on what I can do because he’s a pessimist and I need to prep.

Also, we’ve got as much insulin (4weeks worth) as his insurance will cover.