You’ve probably already done this, but if not, subscribe to this paper asap. Then call the rental owners as soon as you see their ads. They go quickly in Coronado. Most owners do not use property managers so you cannot count on your realtor to get you a place.
The charm of Coronado is being able to walk and ride bikes to everything, even to the grocery store, so do not be seduced by the newer construction and plentiful rentals in the Cays (even if you are thinking to yourself… “well, it is only for a little while until we find a place to buy”). You’ll regret it quickly. Drive drive drive up and down the Strand is what you’ll do (I lived there once without kids yet – and it was too much driving even for just me). There isnt even a grocery store in the Cays.