There is no possibility of a "Starship" can carrying 100 people to Mars. NASA has figured the can has room for a maximum of 17 astronauts on such a trip. And,

There is no possibility of a "Starship" can carrying 100 people to Mars. NASA has figured the can has room for a maximum of 17 astronauts on such a trip. And, that is without spacesuits or anything else they would need once there. So figure another, cargo, can for the stuff they would need on the ground. Maybe bring along a couple of spacesuits in the crew can, to wear while they fetch the rest. And, maybe just 9 crew so none kill each other on the way out.