It would go for that, but it would undoubtibly be unable to start as self sufficient. There is no way they'd be able to hold off until every thing was good to go.

The reason that importing would be fine to sustain it is because it would almost certainly be begun as mining or something other thing to bring needed materials to Earth. So the transport could go both ways (import the needed stuff to sustain it on the trip there, and export the minerals on the way back to earth).

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