A more likely scenario...

at least in the short term, is Ron Miller's image in Out of the Cradle (1984), which sees a Terra-Luna economic system developing, and the long rails are mass driving monorails which can launch people and cargo to service points between the two worlds. This, then, is an industrial center.

Yes, even as earthlings bring sapience to the coasts of the interplanetary ocean, the cosmos moves around them. Mother nature is TITANIC, isn't she?

Aside from the Moon, are there any other 'coasts' closer than Mars?

No?

Well... how about islands?