People invest waaaaaay too much time and money into "zombie apocalypse" solutions. Be it green tipped bullets that are "made for zombies" or crazy expensive rolling forts (albeit quite bad ass) like that thing is.
I think the zombie apocalypse conversations should never go beyond the what would you get if fantasy phase with people. When they start spending real money on things to go hold out in the woods from mythical creatures popularized by George Romero....sigh...people have way too much time/money on their hands.