Just like one of those strategy games Mr Musk,

(warcraft, starcraft, etc)

 

if done correctly, you would need only a few

people to build what you need. 30~50? or less.

 

mostly done by automation. test it here on Earth.

then transfer to Mars.

 

Key areas:

 

1. Laser mining and automation in processing.

2. Space escalator and rocket elevator.

2. Strengthening Earth's Magnetosphere from orbit using laser.

 

Get this happening on Mars,

Mars be able to retain water due to magnetosphere,

shielded from radiation,

then everything begins after that.

 

Eco-system of plant-life, insects, if needed.

Oxygen. Temperature regulation. Livestock. Habitat.