Jimmy has provided some sound advice, and if you get the job, you will also need to consider that whilst working in the way that you propose is clearly with the best of intent, it gives rise to some obligations that your current Contractor would have addressed by taking out Public Liability and Workers’ Compensation Insurance, and by providing your Owners Corporation with Tax Invoices so that your Plan’s Accounts can satisfy an audit.
It may in fact be easier for you to use the relevant Provisions of the Legislation that covers the management of strata plans in your State to enable you to be paid as an Executive Committee (EC) Member.
As an example, Sect.25 of the NSW Strata Schemes Management Act (1996) enables members of an Executive Committee to be paid “in recognition of their services to the Owners Corporation…”.
The fact that “services” is not defined is advantageous, but the disadvantage is that payments made in this way have to be determined at a AGM, and only then for services provided since the previous AGM.
So if you opted for this methodology, you would have to work for 12 months before being paid, but then again, your O/C’s Insurance may cover you as a voluntary worker if you sustained an injury during that pre-payment period.
I think you need to do some more homework, but good luck with your initiative!