For weddings and functions my 9 piece bands starts negotiations at £1000, less if it's local or for friends. We charge more if the gig is a distance away or we have to be there particularly early or leave particularly late. We always specify that we need to be fed. Next month we are doing a function where we have to be set up, soundchecked and out of the way by 8pm, first set is 10-11pm, second set is 1-2am. Including travel thats's going to be a 12 hour day and we are charging accordingly