Yep! Sorry for the lack of replies. I've been job hunting and catching up with some friends who popped in from out-of-country to visit.
The "no locks" law is my dad's, and he has some solid reasons for it, so I respect that. It's getting mom to quit barging in without breaking my dad's rule that's the issue. She's been a little better these past few days (whew... finally a relief), but I'm sure she'll be back at it again soon. Are there any tips on how I can go about talking to her in a way she'd listen to without twisting it in the interim between now and when I can move out, whenever that may be? I noted a few of your replies and agree with the "address the major issues and let the rest lie" bit.