There is a plethora of data freely available but there can be multiple ways to view the data so I am looking for a starting point.

I can't guess based on one data point.

You probably want to figure out how to limit the data so you don't get stuff you don't want. 

I found their data to be so-so and the interface to require a lot of time to work with.

“With interest rates dropping and home price increases starting to ease, investors may be getting out while the getting is good, before the market softens further,” said Todd Teta, chief product officer at ATTOM Data Solutions.

Here is a quick link from the FEMA website that quickly outlines Elevation Certificates and how to obtain them.https://www.fema.gov/media-library-data/1428941960043-a8f37b7e3af25f47396bbff04e7bf036/FEMA-HFIAA_ECFActSheet_040715.pdf

The reason I was NOT using a CRM was time wasting data entry, so I ended up with Hubspot because the free version will spy on your outgoing emails (if you OK it) and auto-add people to the database.

It includes, among other things, a comprehensive map of the Cleveland area, grading each area from A+ down to F, using a consistent, objective and transparent methodology using publicly available data.

I have no data to back this all up, this is solely a personal opinion. https://www.cnbc.com/2019/08/08/big-short-investor-steve-eisman-says-zillow-has-one-of-the-most-flawed-business-models-hes-seen.html

@Michele Velazquez - The airdna.co is a good set of data / research tool, although as you get deeper into a specific market best to check and re-check with local experts and property managers.