Not sure how many aussies are aware of this.
But you can fly your phantom for commercial purposes in aus without getting an repl.
You will need an arn tho which cost nothing.
Not trying to be the drone police or anything like that. Just thought i would put those up in case peeps in oz not sure on the rules here.
We have many uncontrolled airfields here and yes you can fly near them just be aware of any aircraft that maybe coming or going.