you can utilize a skip tracing company to get contact information for the owners.

Salaries, compensation, rent, taxes, utilities, fees, MLS, etc.The flat fee model is a recipe for disaster."

And what strategy are you looking to utilize of investing? 

Utilities are OFTEN overlooked so reach out to power, telecom, gas (or go all electric), water, and sewer to make sure you understand what it would take to get separately metered services from the primary house.

Tenant pays all utils except water.  

For example, most anywhere will get $700 room, $75 fixed rate utilities, $700 deposit, and then offer a 36 months, 12 month, or month to month lease ($350 fee if ending lease <90 days). 

I don’t really have an interest in House hacking if long-term rates are $700 a month incl utilities for a bedroom. 

There are quite a number of things that can make utilizing an FHA loan more difficult such as more barriers during appraisal, appearance of low qualification/little cash, typically longer closing period, likely higher interest rate, and PMI cannot be dropped without a refinance if 3.5% down.That said, just chain 5% down conventional loans, and make sure your duplexes pay for themselves.  

I got into RE investing utilizing the same strategy as you're exploring.

Hello Biggerpockets Community, This is my first post as I am trying to utilize BiggerPockets more.