Try very hard not to do this in a church acoustic. Last time I had to do something similar was with a school choir. One step inside the big hall and it was obvious the job would be impossible. We crammed them all into the staff room (carpets and furniture) and got a reasonable result.
You won't get a good recording in a bad acoustic. Period.
You don't have to write songs. The world doesn't want you to write songs. It would probably prefer it if you didn't. So write songs if you want to. Otherwise, dont. Go fishing instead.