Hi Casper007
New estates are generally planned to attract families and therefore provide all of the amenities. At the start of the development rental demand may not be as great but as more homes are built rental demand increases, so if you are looking at estates now that already have homes built and being lived in and you purchase a house and land package, in a years time when it is built demand will have increased, rents will have increased and prices of houses will have increased, my experience of getting in to new estates has been very positive.
Tarneit rents would be $300 - $350 and similarly for Bendigo as examples, I know of a Tarneit gardens home offering 7%