As Col Schultz said, theis is a tough row to hoe and very much a case of “be careful what you wish for”.
Firstly, you would have to convince the Tribunal that there was something seriously amiss that couldn’t be fixed through normal methods. People not following the rules is not enough. The fact that you have mmanaged to forc one unit to remove illegal structures is proof that the system works – it just doesn’t work well.
Also, if a statuory manager comes in, you relinquish all power and influence. Also, becasue they are legally required to do everything by the book, it can make things very expensive indeed.
If I were you I would reach out to all the ethnic owners in the building – maybe bring in an interpreter from one of the friendship groups like the Australian-Vietnam Friendship Society or whatever the approriate ethnicity is, and get them to explain to the residents how and why they need to be involved.
This may sound like a mammoth task but, trust me, it’s easier than running a case through NCAT, especially since the results there are far from guaranteed.
Develop an understanding of how power structures work in those other societies and that will guide you to your next move – take over the whole owners corp, get rid of the dead wood and put things on an even keel.
That is going to be a much more enriching and satisfying process for you than bashing your head off the NCAT brick wall.