How can I escape my fate ? What would you do?

Someday not too long from now I will be alone. I am in great health, a few aches and pains but great vision, mind intact, finances ok, no debt. My great fear is being left at the hands of two vultures : my two daughters and son in law. My younger daughter and I are not close and she is very controlling and admitted she wants me “to be passive.” That’s impossible; it’s not my nature nor hers. Her husband has been to our house three times in twenty six years. No holiday dinner will get him over here and I still buy him presents. I’ve never gotten a phone call from him. He dislikes us because we have spent money attempting to help her older sister and son have a decent life but it didn’t work. They, my older daughter and her son, both smoke weed and she has encouraged him to drop out of school because he kept getting suspended. She has also done harder drugs on and off for years and they’re always broke. We live fifteen miles from the younger daughter who yelled at me for twenty minutes to “make out a will” and three hours from the older daughter and her son. I feel so trapped and fearful thinking of my daughter and her husband lecturing me and trying to control my life. I have so many friends back east but they’re old too. I also have nieces back east. Honestly, it feels like I need to just run away and join a convent. Where should I go when the time comes?
I may have to marry again just to have a buffer of sorts, a protector, but I didn’t wish to do that again and it’s not fair to the guy whomever it would be. I actually feel vultures circling…