Suit (spoiler?)
Why not just use the Iron Spider suit? Presumably the nano-tech can make it pack up real small. Even if he left it behind and Aunt May didn't know any better and sent the wrong one, wouldn't Fury or Happy just being/deliver it?
I get that from a "story-telling standpoint," they want to make it so that he has to take a step back, then do the Night Monkey bit, then build his own suit to show him evolving as a character, but NOT using the Iron Spider suit bothered me the whole time.