I am a Property Manager and have seen many bad experiences with purchasing off the plan. Make sure you go in with your eyes wide open and know exactly what you will be getting at the end of the process. Go as far as mapping out the room sizes in your back yard or park so you know the sizes of the rooms. Looking at plans on paper will not be clear if you have not done it before!! My advise would be to engage a professional to help you with purchasing investment property rather than risk it yourself. It always amazes me when people pay real estate agents to sell their property but not to get the advise in the first place when outlaying hundreds of thousands of dollars!!!