Need a volunteer companion for my father..

I have been a full-time teacher for 32 years. I am retiring early to care for my father. I cared for my mother throughout her battle with bladder cancer. I took family leave twice because the year before she broke her ankle to the point of almost having it amputated. I have paid out-of-pocket expenses for many, many things. I would like to continue to work part-time, but I don't know how much I will be needed to stay with my father. I sold my house and have lived with my parents for over 2 years.