B.O.B./72 hour kit advice needed.

[Rooskibar03]

So now that I'm through "One Second After" My eyes are open to how unprepared me and my family are. Trying to put together a full blown SHTF setup is overwhelming both mentally and financially so I thought I'd start small with a BOB and 72 hour kit and then work from there.

So here are my questions:

Do you treat these two items as one or have a separate game plan for each?

In putting together a 72 hour kit would you recommend 3 individual kits, each taylored for that person(1 being a 7 yr old girl) or would you group everything into one?

Is it better to buy a pre-made kit or pack your own? Is one more cost effective then the other?