And we have the technology to get to a large asteroid in a month, from the frikkin 1960s: Pulse nuclear orion ships can have payloads of SEVERAL MILLION TONS.

And we have the technology to get to a large asteroid in a month, from the frikkin 1960s: Pulse nuclear orion ships can have payloads of SEVERAL MILLION TONS. The issue was the detonating of the bombs in the atmosphere for initial launch stages, but as you say, launch them from the Moon. Near earth asteroid mining may be key to making a planetary space economy worthwhile.