Finding data on rental traffic by town

[Mike Zipf]

Wondering if there is a good place to find data on the volume of vacation rental transactions by area and date. The idea is that I am looking into purchasing a vacation rental property within 100 or so miles of where I am located and want to know the areas to start looking. I have be checking AirBnB and VRBO for seeing where the listings are and what price they are running at but this is just a subset of unrented properties. The rented properties will of course not show up, is there some way to get this data? I am a software engineer by trade so if the data is in a raw format I can still work with it. Any tip welcome, thanks!