The differences lie in how they aggregate, update, and present the data.

There are several great resources for data. 

Every market will have a data center, not sure how this will deviate from the curve of market-based anticipation.

I'm looking at investing in several out-of-state markets (potential BRRRR strategy in mind), I have a list of qualifiers that I'm sussing out to determine viable markets but would love to know: what data helps in determining a good market to invest?

All units would be metered so data would be there to bill the tenants (so no ability to question the bill) but landlord would still pay the bill given we can not have 4 main master water meters (can only do 2 x1 master meter + x1 sub meter combinations). 

I'm data driven and would love to immerse myself in IL, AL, MC specific property, demographic and investor-centric data sources the same way I've done in my previous area of focus.

That puts any of their data sets into serious question.

I’m exploring ways to automate my deal analysis process and was wondering:1.Is there a way to programmatically pull MLS data?

What data source determines the property class?

The list of property management suites at Capterra is a decent start, so long as you take their reviews with a grain of salt.