Hi Feihong,
South East Queensland (particularly Brisbane and Gold Coast) is currently experiencing the highest population growth in Australia... Brisbane fares better simply because they are not building enough houses there to support the population growth. This growth is mostly contributed by interstate migrants from Victoria and New South Wales due to more jobs vacancy and more affordable houses in South East Queensland. Also, economy in the area is doing well with less than 5% of unemployment rate.
tips: The government are encouraging higher density housing around Brisbane inner city. Bargain for properties nearest possible to the CBD with great land quantity. This gives you an opportunity to subdivide the land and sell for great profits later on especially when the land has a DA. However, not all areas would get DA easily. So be careful and do your due dilligence first for the area.
Good luck and all the best!
Thanks for sharing your insight. Encouragement from the government to develop high density residential areas certain helps capital growth big time. What's the major industries in SE QLD that provide employment to ppl? Also, is infrastructure already there to support the expanding population?
P.S.: Granny flat is also allowed in Melbourne, as long as you declare you intend to build it for relatives to live in in the long run.