I may have no choice but to place my elderly mother in a care facility. What are my financial options?

We live in TN. My elderly mother has colon cancer, COPD, and some other physical ailments. Six months ago, she had a violent episode, spent two weeks in a psychiatric unit, and was diagnosed with Paranoid Personality Disorder. From there, I brought her to my home where she remains. I now have Conservatorship. Once I obtained that, I took my mother to a hospital with a senior care unit that specializes in diagnosis and treatment plans for folks with these types of issues. They diagnosed her with early Alzheimer's and she is now on Aricept, anxiety meds, and depression meds. Her behavior is much better! My father will not move in with me and continues to live in their rural home; I have his durable POA. He has hearing problems, memory problems, and I strongly suspect he also has mild dementia. I am an only child, single, with no children. For most of my adult life, I lived three hours away from my parents. I was fortunate enough to have a lucrative job during this time. Two and a half years ago, I left my home and moved back to my home town to care for my parents. I bought a house in our town large enough for the three of us, but have yet to sell my previous home; I do not have a mortgage on either house. I have incurred a lot of expenses due to this move and my mother's recent situation, and can no longer work because I am their sole caregiver. My mother needs 24/7 care and I handle all of my father's affairs, go to medical appointments with him, and do his housework. A stipulation of the conservatorship required me to separate my parent's funds. This resulted in my father not having enough income to cover his expenses. So, I supplement his income by about $1,000 per month. Neither of my parents is aware of this, and I don't want them to ever know. We recently received bad news; my mother's tumor is growing. External radiation is scheduled to commence. She has become ill recently, vomiting regularly. I have been unable to convince her to go to the ER, and will soon resort to having the police escort her in an ambulance. She is not currently violent, but is still very angry and difficult. I believe I may ultimately have no choice but to place her in a care facility. If so, I will have a financial conundrum. She cannot afford it and neither can I. My parents own their home - no mortgage. My mother's income is split from my father's now due to the requirements of the conservatorship. At this point, I cannot afford the cost of a care facility. Are there any options for a person in my situation? I apologize for the long post, but appreciate any advice.