SpaceX COO Gwynn Shotwell has stated that SpaceX plans to have 24 Starlink launches in 2020.
Morgan Stanley forecasts indicate that SpaceX should start generating billions in revenue in 2020 with the completed launch of a minimally commercially viable Starlink network of 1000 satellites or more.
There will be revenue from providing internet to Tesla cars, airplanes, maritime ships and rural and underserved areas. There is also the value to financial centers for lower latency times. Light travels faster in vacuum than in fiber optic cable. The lowest time delays for stock trading will be via the Starlink network.