The richest Houston rapper is currently Paul Wall, who has a net worth of $20 million. Wall got his start in the rap game as a member of the group Swishahouse, and has since gone on to have a successful solo career. He's released several albums, and has also dabbled in acting and reality TV. In addition to his music career, Wall has also made money through investments and endorsements. He's currently the CEO of his own clothing line, and has endorsement deals with companies like Reebok and Monster Energy. Wall is also a member of the rap group Expensive Taste, which includes other successful Houston rappers like Lil Keke and Slim Thug.