The ATO will happily accept information about anyone raising income and potentially not declaring it for tax purposes.
The local council will do nothing becasue they don’t have the financial wherewithall to pursue planning breaches of this nature (which is precisely how Airbnb gets into residential markets all around the world).
And NCAT love videos, emails, diaries, written records and recordings as evidence of breaches – otherwise it’s just “he said, she said”.