Everyone is thinking Humans, land first, then live on there. I think we are putting the cart before the horse on this
Agreed generally. Counterargument though- billionaires, land first, then live(?) on there. Totally sustainable and it even returns a whole lot of wasted, poorly-allocated and ill-gained resources back into the system on Earth for humanity to benefit from immediately. Highly practicable (and flexible, once they're out of orbit it doesn't matter where they go or if anything goes wrong), sustainable, and virtually zero risk (at most, the shuttles are a write-off- using catapults instead might remedy this).
The rest of the process you described can happen after, but I think this is the most appropriate course of action.
Also not to dox myself, but if it happened here as well, I can guarantee we (the country) asked for it, and the world would be better off for it (net positive as you said). Honestly, while it would be utterly tragic and would wipe out much of my immediate family as well and likely my partner and I as well in the aftermath- I'd go so far as to say that if Yellowstone had a massive eruption (of the worst scale imaginable), so long as the US doesn't launch the nukes to bring the rest of the world down with them (entirely possible, maybe even more likely than not) the rest of humanity would be better off (despite the resulting volcanic winter and likely famines that would cause, and the massive disruption or more accurately destruction of much of the modern world economy).
Things are just that bad, and the west is only trying to force the world to even worse. They (the west) only have terrorism now to offer the world; their system is defunct (anyone here should already understand that much, even if it's Hexbear) and is at such a point where it is literally cannibalizing itself and not just destructive and inefficient (as rentier/exploitative behavior always was), but wholly counterproductive to actual production and real wealth (not talking about capital, and wealth can be held either in private or public/proletarian control but you get what I mean) and prosperity, and destroying itself and trying to drag the rest of the world down with it to sustain its contradictions. And that's before getting into the multiple pressing crises their system is causing- climate change, nuclear war, pandemics, neoliberalism...