also look where you will be staying, the heat in summer is terrible for animals. many people i know who have pets keep them indoors during summer. if you are going to stay in an appartment - most of them have rule prohibiting pets. think about the excersise factor for your dog in summer, some breeds need open space and plenty of place to run.
the other thing is you may move here and then hate dubai and want to leave 😂 aus has very strict quarentine regulations, not only the quarintine for dogs (as you pointed out), but a battery of innoculations followed up by blood tests as well.
my suggestion would be to come to dubai, leave the dog with friends, after a few months if you are comfortable with your environment and consider it being a "permanent" move then bring your dog out.