Plan B. Crash dozens of asteroids onto the moon at a few designated locations. (Use rocks that might hit the earth or pass fairly close). Offer free mining rights to companies on a first-there-first-served basis.
If the rock is already crushed you can skip a few steps in the smelting process.
In addition, the total mass of the asteroid belt is something like 4% of the moon's (and half of that mass is in the 4 largest asteroids). You would be better off just mining the moon.
These might be transported back to earth. Plus there's iron, cobalt, manganese, molybdenum, nickel, aluminium, and titanium for construction of moon settlements and factories.