The motors themselves don't rotate. Only the lower unit, which is controlled by a joystick (much like JohnR himself).
So, since they don't move, they can be placed very closely together on the transom. This monster is only 27" wide. You could put 5 of them on the back of a go-fast, and you would indeed go fast.
Money?! Price!? Discussing those points is for pikers. If you gotta show you have the mostest, then price is no object.
It's the same principle as a guy who has two jets. Why in the world would you hobble yourself with just one?