Large tanks of inert gasses and a solar array on an orbiting station would allow a very large, very efficient craft to dock, refuel, recharge, and depart, all using a fraction of the Joules to do it. Once the up-front cost of creating the station is put up.
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Probably would be excellent for when we’re ready to start constructing with materials mined from asteroids but not completely ready for vertical integration at zero gravity.
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