Help my homeless father rent an apartment and start a new life

My parents broke up. My father has recently been forced to move out of our home because my mother decided to get married to her boyfriend and bring him in. My father lost his home a long time ago, has no living relatives and can no longer work due to cirrhosis. My mother decided to no longer support him financially (at all). He is now on his own. He is currently living with me in my rented apartment, in the city I study in. He must move out because my family forbids him to live under the same roof as me, and will not support both of us financially. I am in medical school and can hardly find the time to work part-time to support him. Please help him rent his own home.