As much as I understand that kind of request in this world of burner apps and texting, his "suggestion" of a deposit will hurt his business and I would recommend escorts only do it when it comes to an overnight or a trip.
What a loser, considering how polite you are it was his loss. Talk about being short-minded, he could have just stayed with you and doubled the money. The guy's nothing but thrash. I'm sure the 2,000 he was able to stiff out of you didn't go far.