We'd do far better to direct such efforts to more realistic access methods, such as a Lofstrom loop or variant thereof, which requires no unobtanium and is far more efficient (space elevators lose huge amounts of energy to transmission losses, throwing away a large chunk of the advantage that they gain from bypassing the rocket equation). Active suspension via recirculating kinetic transfer, by one means or another, is something we can do today.
Great post and I'm all for any crazy contraption (by today's perspective) that can reduce the cost of space travel by factors of 100. It seems like you have a great handle on the realities and problems of space elevators. But I think you should apply some of that skepticism to the Lofstrom loop as well. Its quite a stretch to say maintaining 7850 cubic meters of iron moving at 14 km/s is something we can do today.
This falls under a certain