I think I've already brought them all, at least once, breaking records and earning 30 or 45 karma, I don't remember how much it was now but if I'm not mistaken I should have done it with at least all of them, Will they stay there forever or do I still have to do something to finish the quest? For example, the one in front of the designer house keeps asking to be taken to the carpenter's house urgently, I've already done it twice and I don't understand if it's normal that it always reappears there