That's only the cost if you use disposable rockets. About the same cost/kg of flying if you're throwing away the 777 after one flight. Reusable rockets are magn

That's only the cost if you use disposable rockets. About the same cost/kg of flying if you're throwing away the 777 after one flight. Reusable rockets are magnitudes cheaper per launch. Or there's robotic in-situ water mining - Ceres has a shallow gravity well and probably has as much water as Earth. Easy? No, but space is always going to be hard.