Because it means I don't have to deal with worrying about where the hell you're sleeping all night, and you'll be better rested and prepared for the trip back, so that'll go more smoothly too. I get to throw money at a problem and solve it. You have any idea how infrequently I get to do that? Let me have it this one time!

[Money solves some problems in mage society, as Marisbury Animusphere could tell you, but it never had anything to do with the kinds of problems Kadoc had had. Being wealthy wouldn't have made anything any easier on him. But now he gets to be a normal person who pays for things to suck a little less! Surely she'll understand this much?]