3 big questions that i have about Hitch

One of the questions that I have is how did Moss' father get so troubled? In the book it says that Moss' father is an alcoholic and when Moss' goes out and finds him, he finds him drunk.  Another question that I have is why is how did his family get so poor that Moss had to go out on his own?  Another question is why does Moss not stay in touch with his father before he went out and found him?  These are three big questions that I have right now.