How do I decide what is the best environment for my mother?

How do I decide what is the best environment for my mother-- she has Parkinson's dementia and is confused, irritated and unhappy living at home with a full time live-in aid? She constantly tries to run out of the home and sometimes calls the police for help saying that she wants to get out and go home. I have to get over there frequently to try and calm her down - my life is not my own now. My fear of a facility is that she will get worse mentally and physically.