Preppers’ PING!
3 minutes without air - 3 hours without shelter
3 days without water - 3 weeks without food.
Don’t know on which of your threads this info might be most useful, but here it is, FWIW.
While searching for potable water tanks I came across this.
3000 gallon water storage tank $1,220 plus freight
Non-pressurized potable water storage
http://www.plastic-mart.com/product/122/3000-gallon-plastic-water-storage-tank-40635
This outfit has a very wide selection of types and sizes for water and fuel storage.