Murrayo,
Mate, I think your plan is ok but perhaps a little aggressive for someone who isnt that farmiliar with the local areas.
Personally I think it is a fantastic time to buy and there will be a little boom in property in the short to medium term - not sure if it will be in 1 or 2 or 3 years time but I am sure values will increase around 30% in a 2 year period when the market turns.
I am a believer in Brisbane - your idea of close to CBD is sound. Also check out the bayside suburbs such as Wynnum and Lota. These areas will go very well (they always have and they will continue to) and I have property there myself. SC is alright I think but just watch the infrastructure side of things (roads, hospitals etc) as this could minimise growth in certain areas. Go for suburbs close to trains, shops, schools, beach if possible? and you will do well.
The most important thing is that you take some action. It sounds like your gut is telling you there are great deals and now is a good opportunity. My gut tells me the same and I will be buying my 4th, 5th and hopefully 6th property early in 2009. Good luck.