>>64203377
5gallon containers are nice for being able to move around, but you will likley never need to move more than a handfull of jugs around.
I personally own eleven, 5 gallon jugs, (an investment which cost me hundreds of dollars) but ive never taken more than 4 out at any given time(camping)
eleven 5gallon jugs is only 55gallons, thats shiet, youll be dead in a few weeks.
But, you know what else is 55gallons? 55gallon drums, and i have several of them, they are still movable, barely, but key point being its much easier to get a much more substantial water supply with them.

If you insist on 5gallons though, make sure to get ones with scewcap vent holes, not that stupid plug things, because the plugs dont seal right and that leads to contamination over time as they "breathe" dirty air in as the temp changes.
Also this >>64203605 and this >>64203565