Jimmy, there’s an old saying “If it seems to good to be true, then it probably isn’t true.”
In the Australian Taxation Office’s Guide to Rental Property Owners 2018, it states:
You can claim a deduction for certain expenses you incur for the period your property is rented or is available for rent.
The Tax Office is strict – if they see no rental income yet claims for deductions and depreciation, they will demand evidence such as ‘for rent’ posts on domain.com.au or realestate.com.au, letters from the managing agent to explain (a) the property has been available for rent and (b) the reasons why it has not been rented.
It follows that anyone trying on your scenario will fail in their claims for tax deductions, making the scenario a financial disaster.