I'm not trying to be glib either, but regarding the garden of arguments, of why we should, or should not, go here, or there, first, or at all, and does it all really pencil out? I've just given up pushing that piece of string around.

When the dreams of men like Musk and Bigelow, gain traction, and they are, space travel will be less of centrally managed projects, and more of a continuum, or infrastructure.

As to an investor's meeting, or business plan, Elon Musk is the guy who owns the company, here are his words; (From Nick's post, below )

It's important that we attempt to extend life beyond Earth now, he says in an accent hinting at his childhood in South Africa. It is the first time in the four-billion-year history of Earth that it's been possible and that window could be open for a long time - hopefully it is - or it could be open for a short time. We should err on the side of caution and do something now.