This is a great article on moon colonization. It covers the reasons why a moon base can make sense and it is technically feasible. Surprisingly the moon provides most of the necessities to support life; except of course food. Surprisingly the soil is 42% oxygen.
Aside from materials to make rocket fuel the moon has a high concentration of Helium-3 which is a good source of fuel for nuclear fusion. H-3 is a non-radioactive fuel which could be a great long term reactor fuel source.
The materials mined on the moon would be sent into orbit using a dual rail system which fires the materials off a track a couple of mile long. Instead of rockets, electrical energy is used to accelerate the mass.
I’m pointing this out, because this is precisely how my moon base is described in my SIMPOC series. The only major different is, my moon colony named Desert Beach has to be abandoned because 99.9997 % of the people on Earth are wiped out by a suspicious virus and the astronauts on the moon have to use their lifeboats to get home.
Incidentally the first book in the series is FREE.
Ray Jay Perreault