I do 1 church which includes 2 RR + 5,000 sanctuary which is.... vinyl floor. So my share will be focuses on that.
I use 3ft microfiber dry mops to do the intial dry mopping and picking up from the under pews, stuff like pens.paper, coins, candy etc.
using the dry mop takes 16-18 min to do 1/2 the sanctuary.
To Backpack vacuum the same area takes 19-22 minutes.
To vacuum a carpeted sanctuary you might consider getting the widest floor tool you can to reach under the pews.
Good luck, Brad BD janitorial