One of the primary parts of the survival triangle is water. One cannot expect to survive for more than a few days without it. Therefore, it is one of the first things that you should stock up on.
My family and I picked up a 5,000 gallon tank off of Craigslist for $1000. Given it’s capacity, it has the capability to provide a little over 13 people 1 gallon of water a day for an entire year.
We started by prepping the location by raking up all the rocks, and there were a lot of them. We did not put sand down, as the soil is very sandy to begin with (once we raked out the rocks that is). We then moved the tank into position.
We have since put valves on it and filled it with water. We will work on plumbing it soon.