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....
For normal in-house use, I've been using 2-liter recycled soda bottles. They can certainly handle the CO2 pressure, and they are easy to clean and sanitize.
/johnny
First you have to buy them, then empty them but after that they work great. The emptying part is not all that bad either. Hope this helps ... you really do need to be prepared. ;-)
Trust me. ;-)