How do We Afford This?

My 87 year old father has been ill for years but it has only now come to the point where he will need to live with one of us (I have three siblings).

He prefers to come live with me but has previously been living in the house my brother bought for him. He paid half the mortgage in my brothers house. The problem is we are three months away from foreclosure ourselves and will need my father to assist us if he were to come lived with us.

My siblings are more concerned with my brother's mortgage even though my sister-in-law will never entertainment the thought of my father coming to live in her house.

We can't afford food for ourselves as it is, how can we afford to care for my father? I don't know what to do!