My 2 cents ...
You can keep your firearm in your residence, place of business, or place of sojourn.
That is not constrained by who owns the property. If you live with your mother, her property is still your residence. The issue there is, the owner has the right to prohibit firearms. That includes apartment landlords. When you sign a rental agreement, check to see if your guns are forbidden or not.
"Residence" stops at the entrance. A common area is an amenity, whether or not it includes a pool, laundry room or meeting hall. While you have access to use it, it's not part of your residence.
I'd say if the place can be controlled by you, and anyone else entering without your permission is trespassing, then you can carry there. All common areas would be considered public spaces -- and we know CCW permits are all about being armed in public. No permit ... no CCW in public.
I'm not a lawyer, but I have used a divorce attorney once.
