The Mars Ice Home is pretty rad. Basically robots would set up a domed structure coated with Martian ice to keep out the galactic cosmic rays that will straight up murder your ass if you get hit with them. Astronauts will then live and work in the Mars Ice Home. The water that the robots stock the Mars Ice Home with could then be used as rocket fuel, presumably to come home. Check out this 3d printable Mars Ice House concept, it’s also pretty rad.