At the moment, Sydney is the most expensive place in Au to try to fulfill that dream. Especially as for many people, it means a 70 minute commute. In a car. Or 90 mixed mode. Ouch.
Having lived (briefly) in a house on a largish block with 2 cars et al... no, I don't want that. It's too much work, and it's too much money. To do that effectively means moving away from the city.
Problem is, my job is (currently) in the city.
I'm happy with a 40 minute train journey, so what works for me is a unit or townhouse within walking distance of an outer-suburb railway station. That way I spend even less on petrol because the car isn't used most days. :-)
Wade.