We tried searching on Zillow and other websites (e.g. rate-my-agent), but seems like the result is not coherent.

fix them up well, and list them at a good fair market price (this goes back to what your ARV was to begin with), and get that on the market (lower is better to build up to that price, and attract more buyers)!

Like an application ? 

Recommend cash for keys here (like you already tried) and getting them to sign a termination of lease.If the lease period ended and they are on month-to-month typically you have leverage (depending on what your lease says, or local laws) to end the lease at the end of the month given prior notification.

Their LES (like any other civilian paystub) can be fabricated, so how do you know it is real? 

Also you can check Meetup for local investor groups as well as there are some smaller ones around also.I'd say one of the biggest steps is choose a type of Investing.

I personally don't like wordpress sites since they attract a lot of spam.

This is a nice looking unit in what appears to be a well kept building.

I have crazy high DTI (like 80 to 1) but large reserves, crazy high credit scores, and fairly small revolving credit card balances ($20k to $30k but paid off each month). 

Please know that I realize it is a huge job and huge learning curve and may very well not make good sense, but I want to do a thorough analysis  to determine that (and also what price it may make sense for).