Just to run the question back, you are asking about security communications at a place of worship right?
You could get basic duel band monitoring hand held’s with 2 dedicated net controllers communicating with different input and output frequencies assigned to them and then structure communication so that the security team or teams communicate with pre determined frequencies to the controllers who can then coordinate security assets in real time. Unless this is a 24/7 megachurch with concerns then you could go with just the one net controller and a team or two with the same concept at a smaller scale.
I am new to this as well and could be completely wrong but this is what I suspect brother, for whatever it’s worth.