How Much Can Fit in 1 Tile? - Cities: Skylines CHALLENGE

With only one tile to build in, how much can I actually fit in here? Can we grow a city with function traffic, transport, and a stable economy? How many people can live here?
Live stream of this build: https://www.youtube.com/watch?v=u6Zh9jx5S3g&feature=youtu.be
Subway Station: https://steamcommunity.com/workshop/filedetails/?id=1477879568

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