Daughter of Elderly Mother and Step Father

I'll try and be as brief as possible. I'm the only caregiver for my mother (78) who is biopolar, schiz, manic, depressed and dementia.

I've tried everything - including nursing home. Her state of mind leads eventually to violence and now she's in a psych hospital for evaluation and probably will not be allowed back into the nursing home. Her husband cannot care for her - alcoholic, etc. I work full time out of town and because of her condition - living at our home is not an option due to my out of town work as well as it being a problem for my husband. My sibling absolutely will not be involved as well as my step dads kids who have never had contact with their father. I'm stuck - don't know what will happen to my mother. Her husband has insisted that she come home even though he can't care for her. She's been violent to him and I'm convinced this will turn out very bad (murder/suicide, etc). The home health care assistant for both day and night have advised me that they will no longer be involved if she comes back to the home because of her violence, etc.

I live in the North Georgia mountains and 4 years ago had moved them from Minnesota with no idea of the situation. Please help - is there anywhere I can go for advice, guidance or suggestions?