How things have changed........
When I shot weddings professionally, we were expected to shoot in the afternoon, keep a lab open on the Saturday to run the C-41 process, contact and proof all shots ready for the wedding reception in the evening. That's when the alcohol effect meant that many orders were placed for the family/group shots and we made our money.
Of course, the album and staged shots were built into the price, but the reception purchases were very lucrative.
We'd normally close up a package within 2 weeks......and expect repeat orders as the bride/groom/parents passed the album to family/friends.
Mike