Do you have any direct experience with resources for elder care?

My father has rapidly progressing dementia. Mom is taking proactive steps to look to the future (she just sold the house, moved to the same town as my sister and I, set up financially safety precautions).

Dad has been turned down for extended care coverage for having 3 strikes (heart disease, diabetes, dementia). He has too much money for many programs, but not enough money for long term care (when he gets to that point).

I guess what I’m looking for are resources to help my mom cope. Have you been in this situation? Are there resources that you can recommend?