|NASA's Orion MPCV|
|ESA'a Smart-1 ion drive to Moon|
|Apollo 12 - Intrepid Lunar Module|
A single inflatable station module is good to have in orbit around the moon. Such modules are being developed by Bigelow Aerospace. It can serve as bigger space and more accommodations for crews, a port for the reusable lander, and a staging place for crew equipment and supplies. One mission can bring it into orbit with or without a lander to begin with. More station modules can be added to it as needed. Boeing had previously suggested EML2 as a place for a lunar station instead of just simple lunar orbit. I mentioned this plan in my post "Space Exploration Plans From Boeing". I like the simple lunar orbit exclusively for moon missions over EML2 simply because its closer to the surface and it should take less time and fuel to get to. Even if that is marginally true, its still viable over the course of many missions or even a campaign.
With capsules, space tugs, landers, and a space station; a commercial effort can carry out many moon missions for various customers. Thinking about it now, I feel that having a space station around the Moon and a lander would be a good combination for several missions. Humans have gone to the moon, and many more want to go for various reasons. Finding way on how to thrive and not just survive on the moon is important for humanity. We need to spread out beyond Earth. The moon provides a first step towards that goal.