I dont get the part at the end... why did Tony destroy all his armours? If he had destroy them everytime after he created new a suit of armour, then he will not have so many armours in the storage.
It was meant to by symbolic of him leaving his old life behind to start anew with Pepper. Hence it being called the 'Clean Slate' protocol.
Never occurred to him to sell them off and use the money to build an orphanage of course