Before we get entirely too deep into the taxi fares related to minimum wage rabbit hole, let's consider that this is what Anjou claims her mother said. It might well be that she wants to have Seto within reach for the whole vacation, and/or mommy might want to keep an eye on the two lovebirds lest they do something inappropriate.
Also, I feel like Seto have missed opportunities for hugs or kisses on average once per chapter.