The Prisoner of Second Avenue by Neil Simon

Mel Edison is a well-paid executive of a high-end Manhattan firm, which has suddenly hit the skids, and he gets the ax. His wife Edna takes a job to tide them over, then she too is sacked. Compounded by the air-pollution killing his plants, and with the walls of the apartment being paper-thin, allowing him a constant earfull of his neighbors private lives, things can't seem to get any worse...Then he's robbed, and his psychiatrist dies with $23,000 of his money. Mel does the only thing left for him to do-he has a nervous breakdown and it's the best thing that ever happened to him...