What are you waiting for?
To rent, you need two things; a room to be available and someone with points available. Beyond 7 months, you need someone who owns points at the particular resort where you want to stay. Once you hit 7 months, any points can be used, so you'll have many more options on that front, but at the same time, desirable rooms can be booked very quickly at that point. That might leave you out of luck. Your best bet is to find someone with the right points and book it as soon as possible.