Here is what I found with a search:
Geropsych Tucson, Arizona (AZ) - Tucson Medical Center

Senior Behavioral Health | Oro Valley Hospital

There may be more; I don't know that area at all. I'm sure there are more units in Phoenix too.

It sounds like it is time to do this before something bad happens. And sometimes it is an infection (urinary infections are notorious for causing psychiatric symptoms with the elderly) or a medication. I once was at a patient's home while her mother (who was elderly) was threatening to kill her. We had to call the police and adult protective services and try to hide all this from the mother. They eventually found that it was a reaction to a common med she was taking and she was fine after it was taken away. But as you've seen it can become violent and that's no good for you or your daughter.

Honestly I spent a huge amount of my life taking care of people with dementia and a lot of it people with dementia and concurrent psych issues and I still can't understand what it is to do that at home with a loved one all the time. It takes great dedication to the patient and a lot of love. IT also takes being realistic with your abilities for your own sake.

Gero-psychs are usually pretty good experiences. They deal with nothing but agitated depression so that makes them very calm about it. They have simple activities, music, lots of snacks (the unit where I go is linked to gero by a common locked door and the staff always are stealing from the mood disorder fridge), and doctors who can make med adjustments while monitoring everything that goes with being elderly.