Great point. “Enjoying the experience” doesn’t factor in in these situations, it’s nothing but hard work if you’re taking it seriously. I feel for the OP, you’re being asked to be a friendor (friend+vendor), it’s a big ask, and I’ve seen a fair share of very resentful friendors over my 20 years in this industry. If you do a professional job yourself, you should be compensated as such, but if you cut loose and don’t take it very seriously, then your friend asking you to do the work could get resentful himself. It’s pretty much a lose lose, unless everyone takes a chill attitude. I would have an honest and friendly conversation with the friend regarding the situation, give him an idea of the hours you will need to prepare for this, he probably hasn’t thought that much about it, and make a joint decision as to how deeply you should study for this, and/or how you’ll be compensated. Read wedding nightmare blogs to see how many friendships end over one night at a wedding, not really something to be taken lightly. It can work, but I highly recommend some honest, friendly communication.