My cousin is a pianist and will be playing the piano at my wedding. He is also arranging the music for me (especially since I know nothing about musical arrangements and I'm not picky). My question is, what do I do for him? He has already mentioned that he is not expecting to be paid. Should I get him a gift? If so, what kind of gift do I get? He is doing me a huge favor by doing this, and saving me a lot of money, so I would like to do something, I just don't know what.