Yeah, I didn't really waste my time with the moon. All the sites are shit, Mars is much, much better.
Besides, you don't actually need any resources up until you decide to colonize Mercury (for that sweet solar power and many, many science habs). Any ships you make in the first half of the game are utterly shit and useless (sure, you can shoot down an alien ship to fulfill a mission, but the benefits from completing those missions tend to be pretty minimal anyway...), and the only thing you really need a space economy for is science and cash, both of which only become relevant with colonization of Mercury.