I would imagine that the human trip to the moon would be *after* all the robotic colony printers have done their work in building the external structures.
If the structures that are built are robust (especially in regard to flaking away when rubbed/hit/etc) enough, then even furniture could be printed using this mechanism.
And these robots can keep on building stuff, as long as they are powered. As soon as the first module is built, it can build another module, and structures between modules. All we need to do is get the inflatable protective air-tight internal structures on the moon to be installed inside them. And lots of solar panels to mount on the outside. And some means of extracting water and air from the rocks (although initially these would be sent from Earth as well).
For each year of refinement to the equipment done here before launch, I'm sure many many years of work on the moon would be saved, as the equipment becomes more reliable, robust, useful, flexible, and faster.