Payload to low earth orbit might be 100+ tons each. But payload to lunar surface is a small fraction of that. We could assume 10 tons. So 210 starship flights.

Payload to low earth orbit might be 100+ tons each. But payload to lunar surface is a small fraction of that. We could assume 10 tons. So 210 starship flights. One can see pretty quickly that any larger constructions far from earth would really benefit from maximum use of local materials.