Haha! If you do decide to water this way make sure they have good roots before you start otherwise they will drown. You can over water coco despite what some people will say. Also you can't go back to daily waterings after you start. The plants will have massive roots and dry out really fast leading to salt build up, lockouts, and pH problems. Ask me how I know.
I have to keep the EC low (less than 1.2) when I grow this way, but others don't have the problems I do and run way higher.
The upshot is that they will grow very quickly. If you treat the coco like soil you will get more soil like results (slower growth)