The best space colony export being considered now is a sunshade installed at Earth-Sun L1 made from asteroid materials, probably some combination of plastic and metal films made from a carbonaceous chondrite. They would be something like this<p><a href="https://en.wikipedia.org/wiki/IKAROS" rel="nofollow">https://en.wikipedia.org/wiki/IKAROS</a><p>Sunshade modules would function as solar sails so they could navigate on their own power from the point of manufacture to the point of delivery and not waste volatile fuels.