1) Deep skip trace including all relatives2) Hire a Private InvestigatorGood Luck

It's going pretty deep, right? 

You could easily get yourself into a deep dark hole.

A side benefit is the Roxul (rock wool) insulation helps with sound proofing ... we have even begun putting it the walls surrounding washrooms and laundry rooms when we undertake a deep renovations.

This is pretty much for future reference in case I get in deep with a larger deal and run across this.

I'm a visual learner with a lot of project management background and know that sometimes I get too excited about building the spreadsheet so wanted to see what yours was like for inspiration so I'm sure not to go too deep.

I make sure I dive deep into there motivation while I try to listen to their true concerns.The main thing I would suggest is to remember that most people will give you a cookie cutter concern, based on something they've heard or read, however if you ask a few extra open ended questions you should get the real concerns.  

I'm knee deep in podcasts and forums.

I'll concede to some like if I need to buy appliances but my pocket isn't that deep so I can't do like what others do and spend on rehabbing.

A duplex is a good starter investment because it gives the economies of scale with multiple units, but without jumping into the deep end of the pool with apartments.