hmmm, depends on which EMG's he'll install. EMG hz i think, right?
The complicated and expensive thing with EMG's is, that they are active-pickups. So they need a battery. And the battery needs extra space inside of the guitar. Most guitars don't have that extra space inside of the body, so a bit of the body has to be taken out of the guitar.
I heard that this is not the hell of a complicated work. But i wouldn't make it by myself, so i think that the deal isn't that bad.