How do I talk to my estranged father, who is now in a memory care community?

About a year ago, before my father was diagnosed with Alzheimer's (along with paranoid schizophrenia and depression), he became combative with me and my mother (even though all we were trying to do was help him). He basically disowned both of us, felt betrayed, was physically aggressive and threatening toward me and my husband, and verbally aggressive with everyone, including his only granddaughter. He really hated me and my family.

To make a very long story short, he is now on proper medication and lives in a memory care community. (Which was difficult to accomplish. He actually escaped twice from the first Community where we placed him and the police had to be called the second time.) When he lived at home with my mom, I used to visit them each week and we had a great relationship. I have visited him a few times where he is now, and he seems to be over his anger, which is great. (No more escape attempts.)

Now I have the problem. I feel very uncomfortable around him. He has always been a very controlling person. Never let anyone help him with finances, taxes or managing his property. He always wanted to control me and the way I thought, which caused friction between us and between him and my mother. Now I am basically managing all of his property and finances. When I visit him I am always afraid I'll say something to make him remember that he felt I was "trying to steal his identity and property." If he asks me about what’s happening with his houses (which he has asked before), I'm afraid he'll be mad because he doesn't have any control over what's happening to them. Or he’ll want to go see them. Or I'm afraid I'll mention something from the past that will make him sad, instead of being able to reminisce together. I don't really know what to talk to him about. The few times I have seen him I have recognized a flash of that look on his face, that anger and distrust. I have never been a great conversationalist and am not good at coming up with something off the top of my head. (I need a script☺.) Anyone have any thoughts or experiences with this? I am sure it’s not a unique situation.

Thanks for listening!