I live with my dad (94) in his house. I do all the housework and cooking, running errands, grocery shopping etc. I also pay the heat, water, cable, electricity, trash pick-up, groceries (sometimes he gives me a couple of hundred dollars). He also expects me to pay $200 rent since he is "letting me live here". I don't know how to discuss this with him since he thinks it is all right.
Maybe you should tell him he is right that you shouldn't live there rent free, so you are going to move out so he won't have to worry about you anymore. I bet he would rethink things quickly.
It is funny. If your father is like my mother, he has changed it in his mind about who is helping who. I believe it helps them to maintain a sense of dignity. It hurts to need help. But pay rent?? No way!
"Well, dad. I'm going to be moving out next month. Found a place that's less expensive. Let me know which care giver agency you'd like me to call up so you can get the cooking, cleaning, driving and whatnot done. It should only run you about 25 bucks an hour". No, i can't stay anymore (laugh gently) paying for all the stuff like groceries and utilities for both of us, plus all the care you need is really wearing me out. I'm a senior myself you know. You need a younger person to do all this".
Do not continue paying his way! If he doesn't agree he can pay someone else and you can move on.
My mother is a difficult person. I would not be here if there was something that made more sense. I appreciate that she has the house and pays the utilities for it, but that is pretty small compared to what I give. If she were to insist that I pay her rent, I would consider it the final straw and help her find a place in assisted living.
So you have been paying your father $200/month rent for how long? During that time, have your expenses and care for your father been increasing?