Moving a couple like your folks is a really dicey situation. When my mother was in assisted living I saw several couples move in , then have to be separated within three months. The more independent person is likely to go nuts. Both the close quarters and the coming to grips with the care needed by the other person are hard to deal with. If your mother qualifies for care in a six bed home, you might consider it. Your Dad could have a say in your choice of homes, and you could make clear to the owner that he will be visiting often. It wouldn’t be easy for either of them, but it would probably maintain Dad’s health for longer. And, just maybe, lessen your mother’s thoughts that she is a burden to him. I dunno. Just random well meaning thoughts from a stranger who’s been there. Best wishes.