Girls, What do you think about this idea?

My brother suggested that I take care of his father in another state for free in exchange for housing and food. Because he is not in good health. He is not my real father; I am adopted. He is my brother's biological father. He has always been an absent father and has never come to see us. My brother earns a good salary but cannot go there to be with him and had this idea. Then he and my mother had this great idea because I am unemployed. They want me to trust that he will support me even though he earns minimum wage. (English is not my Native language ok)

Girls, What do you think about this idea?
Post Opinion