Background: Hakeem Olajuwon was born to Salim and Abike Olajuwon, working class Yoruba owners of a cement business in Lagos. He was the third of eight children. He credits his parents with instilling virtues of hard work and discipline into him and his siblings; "They taught us to be honest, work hard, respect our elders, and believe in ourselves". Olajuwon has expressed displeasure at his childhood in Nigeria being characterized as backward. "
Context: Olajuwon played for 20 consecutive seasons in Houston, first collegiately for the University of Houston Cougars and then professionally with the Houston Rockets. He is considered a Houston icon and one of city's most beloved athletes. Olajuwon has had great success in the Houston real estate market, with his estimated profits exceeding $100 million. He buys in cash-only purchases, as it is against Islamic law to pay interest. Olajuwon splits his time between Jordan, where he moved with his family to pursue Islamic studies, and his ranch near Houston. In the 2006 NBA offseason, Olajuwon opened his first Big Man Camp, where he teaches young frontcourt players the finer points of playing in the post. While Olajuwon never expressed an interest in coaching a team, he wishes to give back to the game by helping younger players. When asked whether the league was becoming more guard-oriented and big men were being de-emphasized, Olajuwon responded, "For a big man who is just big, maybe. But not if you play with speed, with agility. It will always be a big man's game if the big man plays the right way. On defense, the big man can rebound and block shots. On offense, he draws double-teams and creates opportunities. He can add so much, make it easier for the entire team." He runs the camp for free. Olajuwon has worked with several NBA players, including power forward Emeka Okafor, and center Yao Ming. In September, 2009, he also worked with Kobe Bryant on the post moves and the Dream Shake. More recently he has been working with Dwight Howard, helping him diversify his post moves and encouraging more mental focus. In the 2011 offseason, LeBron James flew to Houston and spent time working with Olajuwon. Olajuwon has also worked with Omer Asik, Donatas Motiejunas, Amar'e Stoudemire, Carmelo Anthony, JaVale McGee and Kenneth Faried. Olajuwon was inducted into the Naismith Memorial Basketball Hall of Fame as a member of the class of 2008. On April 10, 2008, the Rockets unveiled a sculpture in honor of him outside the Toyota Center. Olajuwon attended the 2013 NBA draft to bid farewell to retiring commissioner David Stern as Stern made his announcement for the final pick of the first round. Olajuwon was the first pick announced by Stern back in 1984. On August 1, 2015, Olajuwon made a special appearance for Team Africa at the 2015 NBA Africa exhibition game. He became a member of the FIBA Hall of Fame in 2016.
Question: What did Olajuwon do after the NBA?

Answer:
Olajuwon has had great success in the Houston real estate market, with his estimated profits exceeding $100 million.