Somehow I Still Believe
It would be interesting to see if a potential alternative location for filming would be the Docklands Studios in Melbourne; working the house ala BB Can (with an indoor simulated backyard, especially given Melbourne's shit weather in winter). They wouldn't be able to get a comparable house size to Dreamworld through any of the sound stages, though; so the only option would be to build a 2-storey house - possibly with upstairs bedrooms or something - in one of the smaller sound stages - possibly 2 or 4?
If they saw the possibility of raising the profile of the studios they could consider it; but I'm not sure they'd willingly depart with one of their sound stages for a permanent fixture.
Ohhh i like that idea. Just for the simple fact that I like Melbourne better than Sydney.