This also applies to local crime statistics, even if my data comes from another source.

Most provide an inbound-lead email address that dumps the emailed data into your database and then based on certain rules can automatically email them, text them, notify you or your team, etc.I don't remember the stats off the top of my head but for online lead conversion, you've got to contact that person within minutes.

A CPA is definitely qualified to give insight in this area, but many other data sources support his thesis.

When you have ALL the right data, you can accurately pencil-in the expenses and get to an NOI to derive the CoC & CapRate. 

Many of the list services out there will also pull the loan balances or equity as part of their data sets. 

It's sufficient for me - so far - as I "pimped" my Excel to the point where I can easily aggregate data and have things available as an overview with just one or two mouse clicks.It's a bit more involved when using several excel files for each property (which is what I do for certain reasons) when you want to get an overall-overall view of expenses, income or generally cash flow, as you have to pull the data in from different files which sometimes creates problems with incorrect links etc.I have, very recently, started to look into Airtable.

I've driven through it and a lot of kids are outside playing and riding bikes it seems like a great place for families to live which is why I want to buy in this area.

I know a title company wouldn't do it, but Im sure there are mailing list companies that would have that data.

The corrosive nature of soot is driven by the materials that burned, as is the odor.  

A lot of appraisers will look at comps given to them, but they normally have much more access to data than most and data is king in valuations.