About 20 or so years ago, our congregation had a donated property large enough to build a new Kingdom Hall on. We had scrimped and saved money for many years and accumulated a small nest egg - not enough to build a new hall, but not insignificant.
Meanwhile, the old KH was getting pretty ratty. The BOE recommended to use the money to renovate the old hall.
Hoo boy, we had some old Rutherford-era JWs up in arms over that. Plenty of "no" votes that night - but not enough to win. The renovation took place as recommeded.
Outside of that, I do not recall any other "no" vote on a financial suggestion - ever.