Have you ever taken a bus to Las Vegas? No? Of course not. There is nothing else that screams 'I don't have money' quite like arriving in the gambling capital of the world using public transport. Of course everyone comes to Laz Vegas for their own reasons and some are just trying to make a living and hoping to get their name up in lights, so for them it's just a way to travel.
Of course, that had nothing to do with Laz. He just didn't have a better way of getting there. As for the the Celestial Library, it was now a leather and chain bracelet that was wrapped around his left hand ever since a few days ago.