Zombie sniping would probably get pretty boring since they move so slow. Might as well get drunk just to even things up a little bit. All the non-drinkers can move you out of harms way when you pass out.
I would skip trying to make good beer and just focus on making moonshine. Besides drinking it, I could use it for fuel and sanitization. It also stores better and is a lot more portable than beer.
We used to drink Cruzcampo when I was stationed in Spain. They sold it in 6-packs of 40oz. bottles for the equivalent of $3.
I grew up drinking Milwaukee's Best Ice and I could barely choke down a Cruzcampo.