I'm guessing this is more of a flat fee structure, and he's optimistically expecting it to work out to $1k/hour.

   You can write to my former coworkers in Apple’s 
   Developer Technical Support, and they will point you 
   toward a solution within three days. Or you can just 
   call me and have it ready to resubmit by morning.

. . . so what happens if it's not ready by morning?

Is there a scenario where I'm dinged for $24k in a day while he's mainlining coffee & trying to debug my app?