I learned a lot when my grandfather passed. This has been about 25 years since this ended, but a lot of it still holds true. Even I was young, he started having the early signs of dementia. It wasn't bad. He was still able to live by himself, was on medication, seemed to be doing well. He met a woman at the pharmacy and they started dating. Less than a year later, they were married. She convinced him to sell his house and move into her house.
A few years later, he had progressed to the point where his mental state was much worse off. He would be easily confused, didn't always know where he was, things like that. Luckily, we knew one of his neighbors because in the middle of the night, she kicked him out of the house. The neighbor we knew found him wandering around the neighborhood the next day and called us to come get him.
When we got him and started to take him back to his house the wife was claiming that he threatened her and wouldn't let anyone back inside. We took him home and took care of him. When we went to get him money to live off of, it turned out that she had put herself on all of his bank accounts and cleaned them out. She put the money into accounts he had no access to. We hired a private detective and he found everything that she had taken, but since they were married and her name was on everything, there was nothing to be done.
He ended up staying with us for a summer. We had been looking for an assisted living facility to be able to take him, but the ones that could handle dementia back then were few. We had to wait for an opening to be able to move him in. Eventually, he became too advanced for even that one and we had to find another one. Then eventually, when it became Alzheimer's, we had to move him to a nursing home.
What I Learned
When he started having the early signs of dementia, we should have put everything into a trust. Also, start finding out what the next steps would be for when they need more care as soon as you feel that may become necessary.