Why put a station at an L-point? It's my understanding that only L4 and L5 can be maintained without adjustment propultion, and they're really not any better than looking from Earth. I'd say just put it in orbit.
In any case, I doubt anyone is seriously thinking about establishing a long term space-based colony so far from Earth for the short term. If something goes wrong, you have fewer backup options than if you're on solid ground. Perhaps, once spacecraft with ion drives become reality, but when it's a multi-month trip, terra firma is comforting.
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