Thank you. An interesting read. I found your treatment very thorough given its premises and approach. Sadly we disagree at a point which you seem to take as given without further treatment but which I question:

The ability and energy to set-up infrastructure to exploit interplanetary resources with sufficient net energy gain to sufficiently mine mercury (much less build a dyson sphere).

The problem here is that I do not have refereneces to actually back my opinion on this and I didn't have enough time yet to build my complexity theoretic and thermodynamics arguments into a sufficiently presentable form.

http://lesswrong.com/lw/ii5/baseline_of_my_opinion_on_lw_topics/