Loophole is a term politicians gave for tax laws they do not like. 

I don't know how long you've owned the duplex, and it will depend whether it's been on your most recent taxes or not been on taxes, but there should be income granted to offset your PITIA on this property as well. 

NOTE: We would most likely find a free place to live aka the in-laws :-)3.

While renting yourself, although technically not house hacking, I guess it could be considered living  for free if the cash flow from your other rentals pays for your current rent?

If you would like to connect further, feel free to message me!

It's not a concern if you are already financially free of the W-2 job.

I've worked on a few deals with him and his communication, work ethic, knowledge, and integrity is top notch.If you would like his contact info. please feel free to send me a message and I'll happily pass it along.

Realize you may be better off using cost segregation to achieve greater tax benefits immediately for purchases of STVRs.

Taxes, Insurance, Vacancy, Repairs, CapExp add up to $615 (insurance may be a little high until i get it quoted).

@Bob Asad since you've lived in it for the two years you could potentially qualify for the 121 exclusion, giving you $250,000 of the gain tax free ($500K if married) like @Jeremy Ellis said.