I feel for you deeply. It is not easy. Just remember you have to take care of yourself and have time for you, let alone everyone else. I currently have several syblings and its just me taking care of my father. I have disowned them and put them on the “shit list”. As tough as this may be, just know that when that time comes, you will have no guilt and be able to sleep at night because you did what you could. If your father wants to come live close to you, find him a place and get a nursing aide and meals on wheels to check up on him. I wish you the best. God Bless you and your family.