Details on the duplex:Price: $385kBuilt: 2012Size: 2674 sq ft (1333 each side). 2 story, 3B/2.5B each side w/ 1 car garage & driveway for both, fenced backyard both sides.Interest: 5.49%PITI: $2,698Current Rent: $1,350 but could be brought up to ~$1,600, maybe $1,700Yearly Property Tax: $8,340 (I don't pay any on my side while I live there so $4,170)Upgrades: Vinyl floor in kitchen of both units, new AC (central HVAC) on vacant unit, roof done 2016. 

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

I’ve used seller financing as both a buyer and a seller and it can make a lot of sense in certain circumstances (for example I used it as a buyer when I reached the maximum number of conventional loans I could get, and I’ve used it as a seller to both increase my net proceeds (due to collecting interest as “the bank” in addition to the sales proceeds) and to lessen my capital gains tax hit by spreading it out over a few years).

@Kent Ford Be aware of the property taxes in Texas.

When can you but the “over the counter” tax deeds.

Is it worth getting Bob Diamond's course on 'Tax Overages'?

Why another for taxes?

To add to your excellent points, it’s also important to consider the tax implications of a 401k loan.

If you don't want the property any more a 1031 is probably your best bet, unless it's got a huge capital gains capture in which case you could just take your tax lumps and collect your funds. 

My PMLs are people with self-directed IRA who are perfectly fine with 5-year term while earning double-digit returns passively tax-free in their SDIRA.