How do I stay strong by making the toughest decision I've had to make for a parent while also caring for my family?

I've been a caregiver for parent with dementia before, and I am in that situation again. I lived with my parents for most of my life, and when mom started to decline, the three of us decided to move closer to my sibling so family could make the most of the time she had left. Not a lot changed, visits were usually still just holidays and birthdays.

When mom really started declining, dad made a choice: We'd take care of her at home, instead of being surrounded by strangers in a strange place. Dad made most of the decisions, and I had to do what I could for mom within those constraints. At the time, the only help we received from sibling and her family was either criticisms and judgments or offers to give us a break for a couple of hours once in awhile. She wasn't willing to actually help.

Sibling had reasons for not doing more, Dad's a narcissist and his judgments were always swift and cruel.

After mom's passing, Dad withdrew and within a year of mom's passing, found someone who made him happier than he had been for awhile. I stayed with him, eventually becoming happy that he was living again, but never really wanting to become a part of his new family.

Dad tried to force his new family on the rest of us during our family gatherings, and when sibling put their foot down, dad did the same.

Eventually, I left dad's home on good terms, he was happy for me in his own way and he had someone he cared for in his life as well. Sibling and dad didn't speak for years until dad developed esophageal cancer.

I came back to help, and Sibling said they would as well. They were present for one consultation appointment at the beginning, leaving me to handle dad's care by myself. The first time he was hospitalized due to the treatments, sibling visited dad and at the end of that visit, chose to leave him to me. Sibling didn't let me know why, just that they wouldn't help dad unless he's the one asking for it. Dad told me sibling ambushed him with past dramas and I chose to believe him.

I was the one to help dad through cancer, but it was hell. His being a narcissist and my being not a doctor meant he didn't have to listen to me and he felt he didn't have to tell me what complications he was having until they were bad enough for hospitalization. I stuck it out because I was all he had. After treatment, and after his recovery, I returned to my life and dad resumed his.

Two years later, cancer returned and I told dad he'd be better off with professionals than with me as a caregiver because of how much he hid from me and didn't hide from them during the first treatments. I stayed where I was, and dad beat cancer with ease.

Then Covid happened. I don't mess around since I'm very high-risk and so is my family. We still mask up when we have to go out, but we still take every precaution.

Last year was a rough one for him. After he had a stroke and while he was going through a stay at a rehab facility I hired a geriatric care manager to help me out from afar. He fell not long after returning home, and the decision was made to get in-home care. They were great until questionable decisions were made without me. (I cannot get into more about that now.)

Last week, the in home care company abruptly terminated dad's service, and with no other choice, I risked Covid and came back to see how I could help his situation and realized I'm in over my head. He now has dementia, he's nearly bed bound, and after reaching out to a still very judgmental sibling who won't help me and thinks I should sacrifice my family and stay with him since he may not have long to live.

I don't believe I can provide the care he needs in his home. These last few days have been hell and I believe a memory care facility near my home is the best thing for him. I've decided that I won't be visiting him in the facility because of Covid concerns and the well-being of my own family and I need to know that this is what's best for everyone before I start.