As pointed out by other memebers not having children is a choice (adoption is an option) and she didn't choose to immigrate close to her relatives when she was younger and may be qualified. That's also a life choice.Thank you for your advice! I know is not a simple case but I wont give up easily. If she has close relatives that she can be with, then is a diff story. A lifestyle change is a preference, but the needs to be with family is much more than that. As she gets older, living and being alone all by herself will become psychological and mental challenging. this is really a case of family reunion.
Since she has lived in USA most of her life, she can setup some care system there.
Don't get me wrong, I do not have children as well. So it's my choice to be possibily alone when I get old. I just need to respect my choice.
H&C isn't really an option for her. Moving to a border town so hers and your visit can be easier could be an option.
Unless IRCC have new sponsorship policy in the future (which I don't see it coming), there is no option to sponsor her.
Many parents cannot come to Canada to stay with their children. So if any new policy is coming up, they will get the priority.