I thought I came here with some weird questions... I certainly don't have a walk in safe, but here's some example of people with end of the world prepper bunkers.
I have a friend with a solar installation business and he's told me of two different jobs he's done for very wealthy people. They don't actually live nearby, but they think that when shit hits the fan, they'll come on over to their underground multimillion dollar shelters. One of them has a permanent set of caretakers that maintain the small farm, can/preserve everything, then keep it stocked and rotate through. That's kind of like a walk in safe, isn't it?