We used Manuel Burgoin for our vow renewal and their were only 8 of us. He was there for 3 1/2 hours so, for a regular wedding, 4 hours will go by so fast. We didn't do the getting ready photos or anything like that so add in those photos, the ceremony, afterwards with family, the 2 of you, cutting the cake etc. You will wish you had more than 4 hours. The photos will be more intimate since it is a small group.