Curious lang po bakit gusto mong mag-Pasko dito sa Au... sobrang init po ang Pasko dito...
Pero that's beside the point. From the way you write, you seem to be very aware of the need for strong ties to the originating country to be considered as a valid visitor. Without job or properties, that would be difficult to prove but then sometimes Au immigration do approve visa applications from someone with the same situation. You will have to take that risk but be ready for the worse.