Special resolutions in Victoria are not all that complicated but they can be almost “mission impossible” to achieve in larger stratas.
That’s because even an interim special resolution needs at least 50% of all lot owners to actually vote and to vote in favour with not more that 25% of all lot owners voting against. It’s not 50% and 25% of the lot owners that decide to vote in a meeting. Interims are finally passed after 29 days during which they can be subject to challenge.
Try getting at least 50% of all lot owners to actually vote in a larger strata! One of my larger Victorian stratas (200 lots) has only achieved that once in 20 years!
But that’s not the OP’s situational with the numbers. And if at least 75% of owners both actually vote and vote in favour, even a special resolution passes immediately. In an 8 lot strata, that’s 6 lots actually voting and voting in favour.