Hi Guys,
As a Gold Coast super host I can identify with your listing details in pretty much all respects and had a similar problem when I first listed 12 months ago. July and August we very disappointing. However I've gone from an initial 41% occupancy to an average 74% - a figure I'm quite happy with. What has intrigued me of late has been the last minute reservations that appear to fill those little 2 & 3 day holes in my calendar.
The only thing that I can put it down to is that I regularly review and update my listing - constantly upgrading each week. Might only be a sentance or two, a new photo, simple things like adding that the pool is Heated! ( How obvious) - and most recently using positive quotes from guest reviews in the introductory preview copy to endorse my other descriptions.
I view My Lisitng as a living thing constantly in need of attention and constantly reviewed from a guest perspective. Can't guarantee that this will solve your problem but I firmly believe it works for me.
Cheers Chris M.