OK, several concerns here -
First, the organisers of the raffle, thinking this is a really good prize.
Second, the people who buy the tickets, thinking it is a good prize!
The purpose of a raffle is to raise money for a good cause. People wouldn't have such things asa raffle prize, if it wasn't likely to work as a money-spinner.
So don't be too hard on the church - this is just a symptom of s much bigger, deeper problem on so many levels.
Mind you, I did find what they said to be interesting - this is a retreat all about meeting new people; here, have a gun.
Marg