Wow, where to begin? ? ?
Stone, first off, thanks for your service on behalf of this country is a country that one former cop/soldier/contractor said smelled like ass!
The first season of The Best Defense is available on DVD, and the first season of The Best Defense: Survival is coming (soon, Rob?).
Given your time in Iraq, I would guess you have seen a lot of "to do's" and more "not to do's" that can applied over here as well. There are tons of things to consider, from a reinforced safe room inside to thorny, spiky plants under windows on the outside.
First and foremost is to live in a gun friendly state, i.e., NOT kalifornia, illinois, taxachusetts and the like. Make sure the state is shall issue for CCW, and confer with a local defense attorney on actual court cases in which weapons were involved so you know what the reality is.
Good on you for thinking along these lines. I'll let Rob Pincus and Michael Janich (and maybe even MB, the noted international consultant on things survival

) wade in.
PS: Welcome aboard! Swing by the new member thread and introduce yourself so we can all pile on!!!!!