Legally, in the US, every adult is allowed to brew 250 gallons of beer. I know some homebrew guys that keep enough materials on hand for 1000 gallons. And they aren't preppers. ;)
/johnny
50 gallons is enough to get things going, trade for other stuff, additional ingredients, etc. I’m mostly limited by the number of E-Z cap bottles we have. Those things are not cheap.
And we are adding to our stash as we can. Other items are taking priority right now, mostly those of the brass and lead persuasion.
And food. And more medical supplies....
And I’d be really polite to those thousand gallon home brew folks if I were you. LOL