Mumbai (formerly called Bombay) is a city of enterprise.
This is an image that has stayed with me... this person has found a need, namely, of cleaning people's ears, and has a mobile enterprise running out of a small pouch.
Consider this: VT (Victoria Terminus, now known as Chattrapati Shivaji Terminus and a UN World Heritage Site) is one of the busiest places on Earth: a few million people pass through this square every single day. More than twenty lakh people alight or board trains at VT. So this dude has got the location funda figured out pat. As have thousands of people who ply some trade or the other here.