I've used AirBnB a fair bit to spend time on the Notthern Beaches the last few years, "the Curly Surf Shack" was by far the best experience and I just wish I had known about it earlier. Brilliant location, just around the corner from Manly and 2 minutes walk away from the surf. The room has everything one needs to be independent and parking is a no brainer.
Last but not least, such a nice and happy welcoming family; A-WE-SO-ME.