Are these budgets available online, or at least at the ask to the public? Since they're not paying taxes, I think they should be. If not, then who exactly is it transparent to?

The church across the street from my house is large and I'm sure heating and upkeep is no small chunk of change. A good portion of the cars parked in the reserved row (staff) are nicer than mine, so I'm guessing the salary isn't necessarily "modest".