@Jose Dedomenico The sold data that you see on Zillow is pulled from the MLS so that may be a good place to start initially, but these other websites that specialize in property research are more user friendly if you plan on scaling in your research.

I'm from a bit more south and only know what I can see from MLS data and google street views.

That address will have the most up to date information and best data. 

Forgione also said the city would need to hire someone to help track occupancy data and identify law-breaking rental properties."

I don't know how to research an area yet im not that good with searching for data yet or what steps to take but episode 235 im re listening to right now and I may buy his book he talks about how to get started. anyway thanks I go to Kingston to shop at Walmart so im somewhat familiar its not too far from us!

Then for someone to clean up the data and double check for accuracy, errors, and skip trace more information on the representatives (Fiver or the like is good sources.) 

If you've ever done work on your own house, then you likely have some data points already. 

@Jarrod KohlMetro Detroit (my rental portfolio is here)Purchase: $80k-$130kRent: $1200-$1500ROI: Double DigitCash flow: couple hundred/monthAppreciation: Double digit (for past 10 years, will gladly send data)Location: C, B- (suburbs and certain markets)We have over a dozen Fortune 500 companies just in Metro Detroit with huge Healthcare and Auto industries.

Try looking for LiDAR data provided by the county/city for more accurate elevation data.

I’m sure there are other ideas but we’re looking for data-driven choices for this troubling situation.