i'm used to shooting a 12g and 410 shotguns and i would take it out to pratice wouldnt be any use if i couldnt hit the target lol. mainly it would sit away from my kids and be used as protection. as long as i can affoard the rounds the more it will get used to just go out and pratice on some targets, so yea i could very well get 1000 or more rounds out of it in a year
For home defense, if you are already reasonably proficient, with a shotgun. Stick with that

As they say in the army... "Your pistol is for fighting your way back to your rifle." A box of shotgun shells is cheap and you can cycle the buckshot in and out of a pump gun a lot of times before you wear it out. If you ever have a real need to shoot someone, like that young mom... you cannot beat a 12 gauge for stopping power. Handguns are only for last resort or carry, since packing around a full size rifle/shotgun is a little inconvenient.
In other words, if you're home, have a (legally) short-barreled shotgun handy. And unlike the Oklahoma mom, you never have to ask if it's okay to stop someone from harming you or your family.
You may.