Wow, you have certainly been through a lot!
Sorry to hear about your mother's dementia. It must be difficult to cope with that when you have so many other things going on in your life. I had a great uncle with Alz as well as a grandmother with BP1 and dementia. It truly is heartbreaking. However, it sounds like your mother is well loved and well cared for, and that's what counts.
On the bright side of things, I am glad you're doing what you can to help out your daughter. It sounds like you and her have a special bond.