Seriously, get your current shit together first. His planes were having a small problem with staying OFF the ground that maybe he should see to before trying to reach another planet
The only benefit going to Mars gives humanity us the achievement of going to Mars. The resources used in the efforts for the one way trip will be wasted when you can use those resources to improve the conditions here on Earth.
You cannot create more habitable space on Earth, regardless of the resources you expend, and given the rapid population growth that is one of our biggest challenges. Combined with the damage already done that will likely take generations to repair, if it's begun before its too late, and we are fighting a loosing battle
Elon Musk is already there.
Personally I think that’s a worthy gift to those generations.