SpaceX plans to bring the artists led by Zozotown's Yusaku Maezawa to the Big Falcon Rocket (BFR).
However, Elon Musk CEO are looking forward to the colonization the Mars far beyond the moon. Although there is still a concept stage, Mr. Musk tweeted his concept design.
It is somewhat strangely SF like... There are small rocket departure and departure place, some colonies like a village, and trees growing in a big dome. From there to the lower right, you can see the solar panel also that a lot of are spread.
In response to the question: probably 2028. No doubt in ten years that it is unlikely that it will be possible to form colonies as per this image on far-off Mars... Maybe planning begins that year, is not it?
Training talent who moves to Mars now, who moves to but the technical part seems to take more.