Oh April and all that are going through this with their parents...it's a very hard time of life, for them and for you.
My parents have been gone nearly ten years now. They died a year and a half apart and were very old. Though my father had Parkinson's the last five years of his life, he didn't have dementia. My mother cared for him along with home health help which they had paid into an insurance plan when they were younger. I lived on the opposite side of the US but went to visit twice a year and stayed for weeks at a time with them.
Prior to my fathers illness, all of us kids...there are four daughters left now...tried to talk to them about living in a smaller place, closer to town. They had retired to a solar house in rural New Hampshire, with a wood stove, not an easy existence for anyone. Or what would happen if one of them passed before the other. They were absolutely not interested in having any of these conversations. They didn't fight with us, they just didn't engage the subject.
In my case, it turned out my parents were right to stay put where they were. And not to listen to any of our concerns. And we were right to trust them to know what they needed. It would have just been a battle anyway, and really it was their business, not ours. When they became more house bound with my fathers illness, the huge windows that looked out on the woods, and southern light streaming in in their own home, surrounded by things they loved, provided more comfort for both of them than being in some small, expensive assisted living place (like my in laws were living in). Home nurses and physical therapists, and eventually for both of them, hospice nurses, were only too willing to come to them. As well as their friends, church members and neighbors. They were participators in their small town. They both died at home, surrounded by people who loved them. For all of us, it was a special time, for us to be with them and for them who never wanted to be in a nursing home or hospital.
I realized that some of my concerns were to prolong their life and their concern was only to have their last years comfortable and together.
Of course with dementia, it's a different matter, one must step in. My heart goes out to any of you dealing with that.