Have you heard bout "nation rental affordability scheme" ? coz the unit that I book, the salesperson told me that their project come with this scheme is good for investor that buy for rental return, and not many project entitle this scheme, she said only 30 projects entitle in melbourne.

Apartment. They are mainly built and sell, pay 10% when you sign agreement, balance pay only when completion. I plan to take Aus bank loan. landed not so close to CBD I think...

I planned to hold for long, rental purpose. Completion 2018 and just imagine AUD vs Ringgit in 10 years times... Hmmm I choose AUD. not sure if it's good move but rental wise should be CBD easier to get tenant?

I look at Sydney, similar size with Melbourne at CBD area already go for AUD 800k plus... that's really so much higher than melbourne and perth. Perth is slightly cheaper than Melbourne but it's much quiet too... at the end I go for melbourne unit. But recently I see so many project selling in Malaysia near st kilda or south yarra, many of them and pricing similar CBD area, maybe slightly cheaper around AUD30k - 50k... I wonder when all complete do that area really got so much rental demand? because these area although near CBD but do need to drive around 10 minutes - 15 minutes to the city, can't by walking .

Walking distance within CBD area I think should be able to rent out?

Please everybody be VERY , VERY careful when you want to buy Australia property.  Don’t be fool with those stories of people making tons of $$$ over there.  There are lots of traps and if you kena one of those, regret also no use lah.
Especially if you buy off the plan.  Don’t be fooled with the 10% payment only now and balance on completion .  No so easy for you to win one.
Heard of sunset clause in the S&P  agreement?  This one is a killer, - if heads the developer win and if tails you lose.
When value of property zoom up, developer can rescind the contract with all sorts of excuses and if property value half dead , then you end holding the baby. 

Yes if you have gone in before 2011 -  make good $ and also worth the effort after deducting tax etc etc.