Oh Aya that sounds incredibly stressfull, its seems so unfair they make people live in such limbo!
Our situation is a little different we will be moving to Queensland into my parents house until we have ourselves sorted and aren't in a particular rush to move to Australia. Having said that I worry that once we are there and its been 5 years and time to renew I worry it will take so long and have my husband out of work. Maybe would be better to apply for PR after 5 years? I don't know I haven't explored all options yet.
We have been going through a similar process here in the UK for my visas but each time I renew I am still aloud to work while awaiting a decision from the home office, no bridging visa restrictions like there, seems so extreme I really hope you get an update soon and begin to live your life again in Australia!