SpaceX founder and CEO Elon Musk is currently speaking at the International Astronautical Congress in Mexico to offer his plan for Mars colonization.
Right now, it costs about $10 billion per person to take a human to Mars right now. He would like to reduce that to the average price of home in the U.S., which is $200,000. This, he believes, would increase the number of people willing to take the trip drastically.
Not everybody will want to go, but the few that do could establish a human colony there.