I like the search features: https://www.biggerpockets.com/search

You need to look at recent sales of houses in the area that have the most common features - not just for the house, but for where they are. 

I don’t care how many week old comps you could show me of identical homes one block away.

Y'know, people, VICE and similar media outlets routinely read this board and cherry-pick comments to feature in their articles that make landlords look like navel-gazing greedy a-holes who should be gassed like war dogs.

Details:Another investment property for me:Purchase $120,000Term 10 year seller finance at 4% interestHe wants $1,000 a month Rents are in total $2,000 a month(under market by $400)I own an identical 3 unit 0.7 miles away that appraised for $187k.

What exactly are the characteristics or features it needs on paper to take advantage of these benefits you're describing? 

Has that feature ever worked? 

The free version will have very little automation ability, but it depends on what you’re looking for.What kind of features do you want?

Then it asks identity verification questions with answers found on your credit reports.

I like the search features: https://www.biggerpockets.com/search