The fact that you brought this up means that at least on some level you see the folly of it. You carry a weapon only to defend yourself and those you love. You can't defend your possessions with lethal force. There is no possession in my home that I would kill or be killed for.
In my state I have no duty to retreat. If anyone wants anything I worked my *** off to afford they'll have to do so with enough force to warrant me protecting what I earned with lethal force.