People were spending 50 to 150K for these underground shelters, from the basic storm cellar to 600 sq foot bunkers with filtered air (filtered from radiation) and kitchen, living room, bathroom and bedroom with multiple bunks. One family wanted booby traps built in so theirs had a flame thrower stair rail and spikes that you could smack intruders in the face with. It seems like a lot of them have an anxiety disorder of some kind. Often they teared up at the idea that they might have to shoot their spouse or kids if they turned into zombies. Really?
You definitely have to be at least middle class or higher to play the survivalist game. My ex was never able to buy the stuff he talked about. Instead of buying a shelter he aspired to move into caves in the national forest in Oregon.
Other people take vacations and enjoy life while survivalists buy stuff they may never even use but dream of how well off they'll be when everything falls apart. Quite the expensive security blanket.
One of the shows: http://dsc.discovery.com/tv-shows/other-shows/videos/doomsday-bunkers-a-preppers-paradise.htm