The Question and Answer section for The Glass Castle is a great resource to ask questions, find answers, and discuss the novel.
They family lived in the house that their mother inherited in Phoenix. She spent her monetary inheritance on art supplies, an art reference library, several typewriters, bicycles for the children, a phone, a record player, and a washing machine.
Ginger is a woman from the Green Lantern..... a prostitute. Rex brought Brian to a hotel with Ginger on Brian's birthday. Brian was visibly upset by the episode but did not give details as to what went on in the hotel room.