You know what a fortified position really is? The place you die during a deliberate attack. I mean, just look at the stunning success that was the maginot line. While fortifying your house/property has some value against raiders who have given little though to it, and mostly are striking solely on a whim, if they take even a small amount of time to plan it out, and have a modicum of common sense, your chances are virtually nil to live through the engagement. Unless you've got a good network of people, and I'm talking 8-15 able bodied shooters, you're not really going to hold off much of anything. And by shooters, I don't mean your wife and kids who you gave a gun to in a pinch. I mean people who know how to fight a weapon. If the SHTF, you're not handing your kid/wife a PSL/Nagant/whatever rifle you want, and honestly going to see them be an effective shooter. What you're handing them is a death sentence.