Property is replaceable your life and that of your loved ones is not.... IMHO I would buy some low cost kevlar body armor and keep it close and then come up with a plan and practice it over and over and make it something you do every so often...
For young kids I would make it a game so as not to scare them....
The other thing you may want to consider is calthrops (basically foot spikes) to slow the attacker while you get your plan going..
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Molon Labe
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