[Unmarked Package]

Although not mentioned in this article, the Orion Crew Exploration Vehicle (CEV) has an interior volume 2.5 times the volume of the three-man Apollo capsules used for earlier lunar missions.

In the Apollo lunar missions, two astronauts descended to the lunar surface in the Lunar Excursion Module (LEM) while one astronaut stayed onboard the Apollo capsule orbiting the moon.

The Orion CEV will carry four astronauts to the moon and all four will descend to the lunar surface while the empty Orion orbits the moon under robotic control. That doubles the man-hours of work and exploration possible on the lunar surface.

Furthermore, the Orion CEV will be designed to support missions up to six months long eventually.

[Jedi Master Pikachu]

Then they'll have to make a new ship for traveling to Mars, and it'll have to have stronger shielding from radiation, too. Even from a solar flare.

[Prophet in the wilderness]

Would they be making pit stops at the ISS ?
I guess it would make it even more costly if they were to build another space station near the moon, then again, what would be the reason for it.