Am quite upset (in empathy) reading this very thoughtful thread.
Mum was in the throes of it for years, we did what we could, but it is important to remember that we are NOT TRAINED how to deal with it.
The amount of times I was hit, spat at, demoralised and humiliated is unreal, but my siblings didn't seem to get the same treatment from her, so I felt at times like a bit of a drama queen. I am not bitter, it was just a manifestation of her illness. But it was very hard to deal with just the same.
Loved my mum dearly, but this awful disease really tests your mettle. In the end mum went into a lovely care home and blossomed there for many years. Looking back on it it was kind of cruel for us siblings to try and care for her with no professional background or surroundings devoted to dementia care.
We have to be practical. I do realise that depletion of inheritance may feature in SOME people's minds, but at the end of the day your own mental and physical health must win out.
My thoughts and wishes are with anyone trying their best to deal with this. It is very tough, but the only advice I would give, is do your best, and when you feel yourself wilting, you really do have to hand it over to the professionals.
Martyrdom never saved a life.