Your key issue would be getting a fresh data feed or a way to extract information from the current available data that other folks aren't already doing. 

Real economic productivity is when a coal miner extracts some coal from the ground.

There is a lot to consider in analyzing a property and cash flow is only one criteria as my initial cash neutral property has had all of my investment money pulled out and significant profit extracted (even with a bad appraisal), has had the rent increase from $2500 to $3135 (both market and rehab increase but one unit is $200 below market so market rent is currently $3335), and, even when ~cash neutral, was increasing my net worth (not counting market appreciation) $400/month via principle paydown.  

You cannot march into their homes any more than the bank can march into your mortgaged home either.Rather than get angry take this as a learning opportunity, an "oops" moment, than extracting revenge.If you're into the business of revenge, then there are much better opportunities in land lording than this.

This is generally reserved for national tenants as I want mom and pop to go up every year in case they go out early I have extracted maximum rent.  

I agree that different operators can extract varying levels of value from the same property.

From the listings online it's just mining rights to a pieces of dirt in Arizona that may or may not have a profitable amount of gold/silver buried there that would cost millions to try to extract.

I cannot extract any equity from the home probably because my credit is not great right now.

Actually they tried to extract pertinent information like what we can offer such investors.

I like value add where stabilized cap rate to cost is really high so more room for profit on the sale or refi.You have to decide what type of passive investor you will be also.Stabilized properties already generally day 1 the investor on a syndicate deal is getting a return but upside tends to be less on sale or refi as most value is extracted out.