Excerpt:
"A city on the Moon will cost somewhere between $100B and $500B, require thousands of Starship flights, and demand a decade of nonstop construction in a place where the temperature swings 400°C between day and night, the dust cuts through metal seals like sandpaper, and a single cracked habitat window means everyone inside is dead in about 90 seconds.

Musk just announced SpaceX is doing it anyway. Here’s the actual engineering path.

You build at the south pole. Specifically the rims and floors of craters like Shackleton and Cabeus, where temperatures in permanent shadow drop below -230°C. NASA estimates 600 million metric tons of water ice are buried in these craters under about 40 cm of dry regolith. That water becomes your oxygen supply, your drinking water, your radiation shielding, and 78% of your rocket propellant by mass. The crater rims get near-continuous sunlight for solar power. You build where the resources are."