Just looking at the temperature range on Mars. It's 1.5x the distance from the sun as earth and the surface temp ranges from a balmy 70F to -225F.
Elon specifically has this dream of colonizing mars, but it seems unrealistic. Perhaps in the future there could be an outpost where humans can visit for extended periods of time, but living there forever seems kind of sucky.
Kind of attempt to evade Earth authorities, at least in dreams.
I think there are decent amount of people who will choose to live in tough conditions but out of the reach of any Earth authorities.
However, I think Mars is a bad idea, dead end. There are billions of much more comfortable planets in our galaxy. It is much easier to get rid of Einstein sect and work out FTL, than to make life on Mars more or less acceptable. :)