OK thanks for that, and the good news is that you don’t need the agreement of the dissenting Owner, just a majority vote in favour at a General Meeting; which you have.
So don’t have another Meeting or wait for the now wavering Owner to convince the dissenter, but just use the majority vote at the Meeting that’s already been held (ie when 3/5 were in favour) and instruct your Strata Manager to get cracking with invoicing and collecting that special levy.
PS – if the repairs are becoming critical as a consequence of the delays that you’ve described, you may suggest to your O/C that they contact one of FlatChat’s sponsors HERE about the pros & cons of borrowing the required funds, and then making the repayments via that Special Levy…..Whale 1740.