Easter Joy’s advice is sound, but will take exception with one thing she said.
There is a point at which you will be unable to provide the kind of palliative care and professional attention that your mother will need. You may find, however, that having respite care in your home might be less expensive and less upsetting to your mom for some period of time before she needs out-of-home care. Do be ready to move her elsewhere, though, if that is necessary. There was a day when all of this was done at home, but that was also the day when there was little difference between what a professional nurse and a well-trained layperson could do in the area of day-to-day care.
In the case of my Alzheimer’s diseased father, my mother kept him at home and that is where he died. And my mom weighs about 100 lbs soaking wet…

So it is not always the case that they will have to be placed outside the home.
My intention also is to keep my lady here with me in the home that we had built for us.
There is no doubt but that it is difficult and that many families will need to opt for placement outside the home. However, many families are also opting for trying to care for their loved one at home as well. Much of the “professional help” is coming available in home - Hospice is a godsend in this area.
All of us are saying essentially the same thing though. Each family must make their own decision based on several very interconnected sets of criteria. Personalities, home set-up, work situations, availability of family/friends support system, professional services available, and financial issues all need to be balanced.
Peace
James