I'm really out there on my own with accounts being ok, aren't I?
Really, it's not that bad! I did it for years, even doing all the accounts for a full kingdom hall build! It added up to the penny! There is one downside I remember now - when it's summer holiday season there's no telling what foreign coins end up in the boxes because the brothers have no use for them anymore, and think you can do something with a Canadian 10 cent coin or 25 Euro cents.
OK, Hall Servant: Organized to do Jehovahs Will p. 56:
"There is much work to be done in maintaining the Kingdom Hall and keeping it clean, so Ministerial Servants are often called upon to assist in caring for these responsibilities. Ministerial servants are also assigned to serve as attendants, to welcome new ones, and to help maintain order at congregation meetings."
So if your elders don't have this organised yet, point out their oversight and volunteer to manage this.