Just my humble opinion.
I recognise that you are in ACT, and I can only speak with respect to NSW . But I think my comments apply equally.
The legislation does not specify any qualifications for the auditor. The auditor for a strata also is not signing off on the correctness of the accounts as is done for a company. The strata auditor is checking that the accounts are a reasonable representation of the financial state of the strata.
So any person who can prove that they have suitable training could do your audit.
Strata accounts can be extensive, but they are not complicated because of the simple accounting method used. It’s generally a cash accounting system. Ie count the money in and the money out. Make sure receipts for match the payments.
Heck you could do it yourself if you can add.