A co-worker and her husband plan church travel trips, usually to places that involve some religious tours, i.e., Italy/Rome, Israel, Jerusalem, etc. They do fundraisers to help off-set the costs. While I personally wouldn't support something like that, there are those that do. They bring a priest along and pay for his costs, and most of the time they have enough that one of them travels for free. I will say they both put in a lot of work planning everything for anywhere from 25-50 people.