Typical me
Steve here is gonna to think outside the box.
Everyone's "Home Defense" or "Office Defense" differs. Apt in the city, or home out in the country. Is one's office in the city where one is apt to have valuables, or the barn on a ranch.
My number one defensive weapon is a handgun concealed. I base MY choice on my life experiences over many many years. My main concerns were leaving, entering premises and answering the door.
Now once inside the "home" or "business" I usually / do have a stock shotgun loaded most times with slugs.
First I gotta get to and from the premises. I am not / was not allowed to walk around with a 12 ga shotgun - though many times I wish[ed].
So I wear concealed a handgun while in the home, and out in the yard. A 12 ga or lever action 30-30 does me no good if I go to the clotheline, piddle in the yard and am confronted, if I fall asleep in a chair reading and the patio door is busted into ( as happens around here) , if I am cooking, the CCW does not bang the stove , get caught in the fridge or get into the spaghetti sauce...long arm in my small kitchen just won't do.
I do not want to scare the beejeebers out of the pizza delivery person or the workman knocking on the door...with a long arm in hand, or in site when I answer the door.
I know from experience what works for me.