If you just splurge on a predator drone, and then employ the team to monitor your block 24/7, I think you'd be a lot safer than if you just got a shotgun. I don't think you're doing everything you can to protect your family here.
I can see it now, some crackhead breaks into your house armed with one of your lamps, and you blow him to pieces with a mossberg. What's that, 20-life for murder? Because you surely can't get away with "I was defending myself from the threatening crackhead who had a lamp in his hand by blowing half of his torso all over my living room" in most cases.
You should get a hummer while you're at it.
Oh, and maybe a mesh-backed baseball hat and a tribal tattoo!
Edit: Besides, buying a gun as a defense instead of buying
actual defenses for your house, just seems to me to be a lot more that you want some bad-ass talking point you can always tell people. Like "Hey, I have a
gun, you guys. And it's a mossberg!" instead of saying "Yeah, we just got some new alarm system." Because bragging about an alarm system isn't as cool.