First off the picture wont load,,with out knowing things like the terrain,, amount of ammo,,available shooting points, preparation around the house( booby traps,early warning, final line of defense[foo-gas}) things like that,, a realistic answer is impossible. I have thought about it before though and having been in real defensive situations before, I have a good idea of how to set up a defensive postion. But I sure hope it never comes to that, because contrary to movies, the bad guys do ocassionally hit their targets too, (wife,child,friend etc)