I'm looking into getting food storage, a 3 month supply that I can actually eat and rotate every few years (i.e. freeze dried meals or possibly something else). Additionally, I'm looking for the best water filters as well as a portable stove, your suggestions are greatly appreciated.

Background: Family of five with children ages 6,4,2

Cost: I'm looking to spend around $600-700, I don't know if this is feasible