Space Settlements built by Robotic Devices
For their initial trial Cylinder space settlements , the investors, with helpful technicians, had early first developed a robotic collection which as programmed could refine asteroid-like materials from some desert land and form ever more capable robotic devices. (If sent to a 100km asteroid of density 3g/cc, (Luna has 3.36g/cc), then it would have surface gravity merely .004 of on Earth, thus very easy to land on and later toss things out from.)