We have ONE priority right now - saving the Earth's ecosystem from devastation.

If we manage to do that, we will all the time in the universe to colonize Mars, and who knows, even the stars!

But if we don't save our own ecosystem, we simply won't be able to afford the quadrillions of dollars it would cost to set up a self-sustaining Mars colony.

For God's sake, stop reading SF stories and look at the world around you.