I hear ya, man. One of my best friend's Dad got diagnosed three years ago, while my Dad was starting to have serious health problem. I was able to care of my Dad, but he did not have Alzheimer's. Just a degree of senility due to his kidney disease. While caring for him until his death was not easy, it was manageable.
But in a lot of cases, I have seen a few that get violent. My friend has his Dad in a facility with folks trained to deal with Alzheimer's cases. He felt a little guilty about that, but i told him if my Dad was going through that? No question. I would have managed to have my Dad there. Trying to care for them at home? Another friend lost one of his aunts three years ago, and his other one is going through it right now. Until a cure if finally found (and God, I hope it is soon), it is a tough choice to put them in a home, but it is the safer choice. Alzheimer's is unpredictable.