Sniper, I have some experience in this situation. My Mother died November 23, 1994 after a long illness. My Dad was able to take care of her at home but she spent a LOT of time in long term care facilities. Actually, going between a hospital and a long term care facility. We had to play the "medicare" game where she'd have to be home for 24 hours then get re-admitted for medicare to continue to pay. The last few months of her illness, us kids would take turns spending nights with her at the hospital as she'd wake up confused and scared. My Dad needed to sleep and he was with her from 0700 until 2000. I had small children at home and a marriage that was falling apart. The stress was UNBELIEVABLE.
My Dad lived alone until he had a stroke in 2005. My brother, sister and I debated about what to do. We contacted the county elderly care services and we eventually got a live in caregiver. My Dad has steadily declined since his stroke but he is still at home under the care of a most wonderful lady who lives there full time. She is good, honest, kind, caring, compassionate and is as much a part of my family now as my siblings. She eventually quit the agency she worked for and is now simply my Dad's employee.
Please DO look into some home care. It's not as expensive as one might think and different arrangements can be worked out such as room, board and some spending money in exchange for care. We were VERY LUCKY to find a good, Christian, honest as the day is long woman.
Consider all the possibilities before you make a final decision.