Just a few thoughts for people taking care of their elderly parents. First of all if they have use of their body and are mentally well, don't wait on them and don't let them boss you around. You don't deserve it. Also, if your parents don't have any money except for social security, you can get help a few hours a week and Medicare or Medicaid will pay for it. My friends daughter and my sister-in-law got paid to take care of their parents but it could have been used for outside help.
I think it is for 16 hours a week. Also, you can put them in a nursing home if they don't have money and the Medicaid and their social security will pay for it.
If your parent has been in the military they will help you place them in a VA facility and receive a small check. My mother-in-law was in the Army four years and we placed her in a VA facility for Alzheimer's patients which was great.
Also, if they are military they don't don't have to sell their home to be placed in one like you do with social security.
Don't destroy your life taking care of parents that aren't appreciative and sometimes very demanding and mean. Don't feel guilty either. My grandparents went to one and they had no problem with it. My aunt and uncle lived in one for years as man and wife in the same room.
Their kids came daily but that was a lot easier than taking care of two people that could do nothing for themselves.
If your parent was particularly mean or didn't raise you, just leave and let the state take care of them. Just because people are old doesn't mean you should put up with their hateful demanding ways.