With one owner having such a large majority it sounds like you are always vulnerable to ‘oppression of the minority’, a well established legal concept, I gather. If a reasonable motion were put but fails, I would expect you could go to the Tribunal seeking an order to give effect to the failed motion on the grounds that opposition to the motion was unreasonable. The ACT Unit Titles (Management) Act makes it explicit what sorts of orders the Tribunal can give. Perhaps NSW has a similar provision. So, perhaps you could work out what would be reasonable with respect to parking with the other minority owners, put the motion, expect it to fail, but then seek an order to have it ‘given effect’ by the tribunal.