They could focus on sand and water taking up a good part of the hood, meaning less backdrop decor or at least it would be on a distance and not as much in need of details. For the city side they could use backdrop elements they already created for Mirror Park, we don't need to walk many blocks back there, perhaps a boulevard with "window shopping store fronts" a la Finchwick. Sound effects might be important in a beach front hood though, and perhaps a couple beach activities, but I guess a basket ball hoop and towels, sun chairs, seagulls and parasols would do - all those are already designed.
