How to handle my mom's dementia and Wernicke Korsakoff syndrome?

Hello everyone, I could really use some advice about my mother who's now 63. It's a long story, but I'll try to keep it as simple as possible! About a year ago, my then-62-year-old mother had a nervous breakdown after getting fired from her job (her ability to handle numbers was failing). She has always been a functioning alcoholic, but her drinking increased exponentially; at the same time, she stopped eating and cleaning up after herself. Long story short, she ended up with Wernicke-Korsakoff Syndrome and suffered permanent brain damage/dementia. She was hospitalized briefly, but was released and now she's back at home. Here's some background of our situation: my mother has been single since the mid-80s, has psychological issues (debilitating anxiety, depression and I suspect borderline personality disorder, but she has always refused to seek help). She was quite emotionally and verbally (sometimes physically) abusive to me throughout my childhood and adolescence, and we have always had a very fraught, troubled relationship that has resulted in my keeping my distance from her. I am an only child, and currently live on the other side of the country with no intention of moving back (I'm 35 and married with no kids). She has pushed all of her friends and family away, and has basically no one left. So flash forward to the present, she can barely drive, cannot handle her own finances (I do them now) and sits alone in her house all day every day, with no concept of time, no hobby (she refuses), and no human interaction except my once-a-week phone call. I am at a total loss for what to do. Financially the situation is a mess because she is living off of early retirement/social security and withdrawals from her IRA, which is dwindling down rapidly. I have proposed bringing her out to my part of the country (as much as the thought absolutely tortures me) and setting her up in an apartment so I could help her with groceries, doctors appointments, etc, but she won't hear of it. She refuses to go to a psychiatrist or pursue any treatment to improve her dementia. She's also extremely antisocial, so she rejects the idea of hiring a helper/caregiver to be in her house (she hates everyone, and I would NEVER hear the end of it). Being an only child and with no father or other family, this is all falling squarely on me—and I would have preferred not to even have a relationship with her! I don't know what specifically I'm asking for help with, but how have you all handled similar situations? How much can I "force" her to change her situation—i.e., sell her house/downsize/relocate, get help, etc. Or, how have you convinced your parent to accept help? Is there an organization/counselor that I can talk to? Any thoughts would be GREATLY appreciated. Thanks so much.