Private schools in India teach a remarkable 30-40% of the population, especially among the urban poor. (See my 2013 paper, Private Education in India: A Novel Test of Cream Skimming for more.) But private schools have come under increasing pressure in recent years from government regulation.
Inspired by projects like Doing Business the Center for Civil Society in India did a detailed examination of what it takes to open a private school in Delhi. This excellent video describes the results: