Anyone had advise on how to do some historic rental rate and occupancy analysis for AirBNB or VRBO. 

Background .....
I have some 3 family buildings in the Weehawken/Hoboken NJ market and under threat of divorce my wife has spoken, 'if we buy another house it needs to be a shore house.'   But she didnt say I can't rent it out too :)

I am trying to get a feel for some shore towns and was playing around on AirBNB by looking up listings in both the shore towns and in my local Weehawken market.  Weehawken is the closest NJ town to NYC and should be ripe for NYC tourists.   What I found was that many of the listings seemed to have huge percentage of the calendars going forward unbooked.    It may be a little bit (but not much early) for summer rentals but on both Weehakwen and NJ shore but I was very surprised at the high percentage of unbooked days.  It could very well be that these units were overpriced and another set of units are getting much better occupancy.  

In the case of the shore rentals I really want to see how they did last year.   Does anyone do this kind of analysis?  https://www.airdna.co/ seems like it might but I as unsure how these guys(and sites like them) can tell if a place was rented.  I guess they can check availability and prices daily and if the place is marked as unavailable before the day expires they can assume it was rented at the last price?   Is that how this works?  Can anyone recommend a site that does a good job on providing information like this?  It seems like there are a lot of results when searching AIRBnb pricing analysis.