Most of our fruit trees need a certain amount of winter chill hours to keep their fruiting cycle going, so the more tropical your conditions, the less likely that these trees will grow well. There are some parts of Queensland where people are able to grow these temperate trees with good success, including inland areas of Stanthorpe / Tenterfield. Closer to the ocean, you could probably do alright up as far as Nowra. The best thing to do if you are not sure, is ask around your neighbours to see what they are having success with, as this is usually the most reliable guide.