Turns out, relatively promising.
Last year, The Daily Mail had a rather jubilant piece on the possibility of there being a Moon Base quite soon, possibly from 2022 on. I don't believe a word of that, but the article is at least convincing in making the case that the technologies envisaged are already there.
Here's a glimpse of what such a base might look like, courtesy the European Space Agency (ESA) and architectural firm Foster + Partners. Inflatable habitats to be covered by robots capable of 3D-printing, with the bulk of the printed stuff actually made out of the Moon's regolith. The capsules transporting the habitats would then serve as airlocks:

And here's a fascinating video of how the building would/could take place:
Also, check out this article. Now, if a certain brand of politicans could just make their imagination work instead of focusing on evolutionary dead enders ....
MFBB.