I was the caregiver for my mom when she developed dementia. She lived with us for a couple of years and her needs increased significantly. She eventually went through two different, senior care, facilities, the second one having a specific dementia wing. Her cause of death was dementia, which is pretty unusual. They told me. Usually dementia patients will have secondary conditions like heart, disease, lung, disease, cancers, and the dementia just exacerbates that situation. My mom was healthy as could be her only health issue was dementia and she lasted for a long time with it. Hindsight being 2020 but I would say to any full-time caregiver is that agent every month you should have three weeks on and one week off. Either another family member steps in or your loved one is placed in a care facility that will accept her for a one month stay. I found that most care facilities often have vacancies that they are willing to use for short term stays. Better that you find one in the earlier stages as they will be more likely to know her and care for her well if her condition progresses. Three weeks on, one week off, totally off.