Super cool and insane ambition, but I don't get the part about the Dyson sphere. I don't see that as a guaranteed requirement to accomplish the goals set out, and it's going to be insanely controversial. That part seems like a solution looking for a problem, to be built mostly because it's 'cool'.

But I don't want to rain on the parade of long-term, crazy-ambition in space, so I think this is pretty awesome overall. But planning unilaterally to build a dyson sphere will definitely make you a lot of enemies on Earth.

Otherwise, godspeed.