You should never have been doing it all yourself. That is the fastest way to caregiver burnout. Family, extended family, even friends or neighbours should take turns.
Next, find out what agencies can help you. Can you get respite care? How about caregivers to dress them and toilet them in the morning, if needed?
Next stage is long term care. I know the USA is very different in this regards. In Canada, the cost is minimal, for basic care. But, some money is still needed.
I was a chaplain in long term care. It was a Lutheran organization, and the care, especially loving the people, was amazing. Not all secular organizations are like that. Find out if your denomination runs long term care homes. I know Baptists and Catholics do. See what the cost is.
I know we owe our parents a lot. When my father was in the hospital dying, he was never upset he had to leave his home and go into care. The only thing that upset him was when my brother and mother did not visit. So, if you put them into care, visit them a lot. Daily at first. I was just visiting a church member in long term care, and he had a friend, one Vic, by name, and his wife visited him daily. I heard yesterday of a wife who was at the care facility for 2 meals every day. That is almost as much work as having someone at home.
Anyway, talk to your pastor, if you are still looking for answers. He, or someone else in the church might have some great ideas of the best ways to transition your parents, so you are not burdened. My dad did not want to burden me, but I was there 6 days a week, when he got sick. He told me to go home, and rest and study. Instead, I brought my books and studied there. But, at least I could go home, ride my bike, work in the garden, and get a bit of rest.
I pray you find some answers to this difficult question. Or, was this rhetorical?