One intelligent rover and one trailer will be launched. The rover can use the trailer to transport the landers to the outpost location. On Mars, the rover drives around the chosen region to find the best location for the settlement. An ideal location for the settlement needs to be far enough North for the soil to contain enough water, equatorial enough for maximum solar power, and flat enough to facilitate the construction of the settlement. - See more at: http://www.mars-one.com/mission/roadmap#sthash.DnxIECGg.dpuf