Searching the Barnstable Registry of Deeds may help.
(You may need to download the free software/addon in order to do the search.)
Then click on free access.
Then click on search public records.
Choose search by address.
Look for the most current deed and see if their address is noted.
Then, 411 or online you go a searching.
I would use a local rental professional to save time and money and also to make sure you don't miss a great rental.
(Please note: when you choose an answer as a Best Answer, or at least give a thumbs up, it helps those who answer questions here.)