SpaceX CEO Elon Musk is a huge fan of Mars exploration and Mars colonies, and in a new interview he says a launch system to send people to the Red Planet could be available in 10 to 12 years. Requirements: it has to be big, and it has to be launched frequently to send millions of people and tons of cargo spaceward.

“We need to develop a much larger vehicle, which would be a sort of Mars colonial transport system, and this would be, we’re talking about rockets on a bigger scale than has ever been done before. It will make the Apollo moon rocket look small,” said Musk in a recent CBS interview, referring to the 363-foot (110-meter) behemoth that was the Saturn V.

In the short term, Musk said he is focused on making a crew transportation system that will reduce NASA’s reliance on Soyuz vehicles to bring astronauts into space (a situation that arose in 2011 after the agency retired the shuttle.) SpaceX is one of three companies funded by NASA to develop a spacecraft able to launch people (with the other two being Boeing and Sierra Nevada.)

Musk said SpaceX’s Dragon should be ready to do that in a couple of years. Meanwhile, there are abort tests to perform and other steps this year to get the spacecraft ready for that milestone.

Check out the entire Musk interview on the CBS website. Naturally, he doesn’t have the only vision for human Mars exploration out there, as private ventures Mars One and Inspiration Mars demonstrate.