Tracking SFRs time on market through Zillow

[Matt Holmer]

As part of my due diligence for an area, I created a simple spreadsheet and have began tracking SFRs on Zillow.  I'm trying to get an idea on how long properties take to rent in various areas of a specific town and what the average listing price is.  With my last property, I believe is listed it too high and it sat longer then anticipated.

 I want to track when new SFRs go on the market in a specific area and the property info (rent, sq/ft, beds, baths, etc.).  That part is easy because I can narrow down the search to properties listed within the last week.

However, what I'm trying to figure out if there is an efficient way to find out when the property is removed from Zillow (i.e. it is rented).  Right now, I just type in the addresses every week and see if it is still on the market.  This is rather time consuming. Does creating a property notification on Zillow notify you when it is removed? 

If not, is there a better way to track this other then typing in the individual addresses every week to see if it is still listed?

Thank you for any assistance!