If the "Unipod" was heavy enough and the "Sky City" itself is bouyant (or has something else keeping it up) enough, I suppose it could work. Its just who would invest in it?
I also bet they put the "Carbonite Freezing Chambers" in there just to make it sound cool.
Oh, and mikenostic, Magnetic fields do not produce radation, they actually repel radation from the sun. And why lead?