My father has been living with me almost 4 yrs. I have been taking care of all his medical/healthcare for the last 7 yrs. Unaware to me that my sister has a healthcare POA, my brother is listed as secondary. My brother who lives 60 miles from my place wants to remove my Dad from my home because he thinks it is too small. I have been retired for two years and have been his caretaker for 24/7 for almost the 3 yrs since I have been retired. The Dept of Aging has been in my place and everything has been done to make everything safe for my 87 yr old Dad. Besides going to get a lawyer to change his Healthcare POA, do I have any ground to prevent my brother from taking him?