Filter recharging kit is only $10 (at AutoStoned) and lasts me two cleanings......but I'm cleaning a 9" cone filter. I'd bet that the flat panel takes much less cleaner and oil due to smaller surface area. He could probably get 3 or 4 recharges out of it. I could be wrong.
I'm not sure if there has been any write-ups about the gains realized by the GT and SE with a CAI. Hmmmmm....I wonder.