Suppose we do this and have #5, #21, #22, it's probably worth noting that:
a) We just gained even more cap room
b) We could probably move up to #2 for #5 + #22 or similar.
So the haul could actually be something like Thomas Robinson or Bradley Beal (#2), Tyreke Evans, and enough extra cap room to sign Green, Garnett AND Hibbert / McGee / Ilyasova.