The SM doesn’t make these decisions the EC or OC do, so get the Sec to TELL the SM to approve the quote and start the repairs and to explain to all owners why their is not enough funds available if that is the case. If the cost has gone up you might require another vote to approve the new quote and I’m not sure if postal voting is allowed in WA (to speed up the process rather than have an EGM).
Remember the SM works for the owners and is their to do the bidding of the owners.