To build sustainable momentum toward the Luna City vision, I think we need a relatively simple and cheap first Moon mission.

A lunar cubesat (I am using the term in the "small and cheap satellite" sense) to study candidate locations for outposts and settlements would be a good first mission.

This mission is doable within realistic time and budget, but ambitious enough to establish SC/SD as a player and motivate space enthusiasts to participate.

I have considerable experience in (Earth) observation sats and can help out.