Trouble is that not everyone has a home in which to quarantine or even a home which is suitable for quarantine, particularly non-Oz based Aussies or eg PR visa holders arriving for the first time. I don't know what criteria would be allowed for home quarantine but I would guess you would need to be the only occupants of the property and it would need independent access (so no units with lifts or doors opening onto common areas for example). I'm (grey) nomadic and am quite sure that I wouldn't be able to find a caravan park which would take us and even if they did we'd need to empty the loo and we'd be unlikely to have people around who could deliver things we needed. Even getting essentials like foodstuff on arrival would be difficult. I doubt we could stay with friends or relatives. So unless my tenants leave at just the right moment (in which case we'd be returning to a unit with no furniture or utensils etc), we'll be returning to hotel quarantine no matter what. If we can find a flight to get back to Oz that is!