The Rich Are Planning to Leave This Wretched Planet
nytimes.com
nytimes.com
If you really believe this, then you clearly don't understand just how inhospitable the rest of the universe is to human life. Antarctica is tough for us... Mars is antarctica without breathable air. Colder, far less pressure. Every resource your life depends on is difficult or impossible to get on Mars. You evolved here, not mars. And probably for the rest of my life, going there without a way back is a death sentence.
Do you really think Musk is planning to go to a lifeless planet to suffer and die?
The Expanse series, despite not being 'hard SF', does explore a bit of the challenges in detail. Mars is too cold and too dead, and Jovian moons are too far from the sun.
You can build arcologies or other artificial habitats where life can be sustained, but the supply chain for making sure those habitats stay up will still require Earth. If anything goes wrong, most everything a habitat will die, and you will need another supply of ready humans and plant/animals to repopulate it.
If anything goes wrong, you likely will not have a sufficiently self-sustained autarkic supply chain on Mars to bootstrap the process from scratch again, hence Earth.
Earth is an 'infinite' (from the POV of a relatively dead place) supply of biodiversity, genes, organics, people, and manufactured goods.
It does not sound like something that will be attractive to the leisured wealthy aside from the very few who are into extreme sports and bragging rights. You don't see rich people going on six month camping trips in Antarctica and any space colony that isn't in LEO is going to be even more distant, less stimulating and more dangerous.
And when you have visited most wonderful places, the most unlikely one are the one you seek. There are many travel agencies proposing this. And it is better if there is a well known scientist on board:
https://oceanwide-expeditions.com/blog/at-home-in-antarctica...
That sounds like a padded cell... Apparently, that's also exactly what it looks like[0]. Further... check out "axiom" on Google Images[1].
[0]https://static01.nyt.com/images/2018/06/10/fashion/10AXIOM-i...
Might as well go on this trip
Having all humans exist in the local stellar neighborhood leaves us very vulnerable and a single point of failure.
Having all humans exist in the milky way leaves us very vulnerable and a single point of failure.
Having all humans exist in the local super cluster leaves us very vulnerable and a single point of failure.
Having all humans exist in the universe leaves us very vulnerable and a single point of failure.
When you make your system large enough, it always has a single point of failure. False vacuum is a thing (maybe).
Edit: now I’m interested in how many BFR flights gets one TBM to Mars surface
It depends on how big the TBM is and you also have to ship a bunch of power generation to run it and so on.