Oh, Musk's approach probably would require an inordinate number of fueling missions. That's built into the reality of his delivery-truck system design. He doesn't know how to slenderize it for the sake of an efficient Moon mission. That would take about as much money to do as it took the Apollo program who knew from the beginning it was the only way it could be done with the resources at their disposal. But, ditto. We are of an age.