[hamdingers]

Hogwash! We can do it much faster than that. With a machine in Alpha Centauri capable of flinging rocks full of rare earth metals back towards the solar system at 1/10th the speed of light, we could be up and running in <150 years.

This feels about as realistic as most of the spacetech proposals I hear.

[usrusr]

I'd imagine insurance premiums to get quite ugly with all those 0.1c rocks passing by

[hamdingers]

Not my problem, I'll be long dead.