Mumbai, Apr, 13 (EPC News): According to the 2010 census, Mumbai now houses around 14 million people, which makes it India�s most populous city and the world�s second-most populous city. It is also India�s richest city because it has the highest GDP. Unfortunately, it also has an extremely complicated and lopsided real estate market. Properties in the island city are notorious for being the most expensive real estate in India.