Tax autos out of existence. 

However, due to rising insurance and tax costs, I'm starting to feel the financial pinch as the tenant currently pays rent 60% below the market average.My long-term goal is to acquire more properties, and I've considered doing a cash-out refinance to access equity for reinvestment.

My friend once found an old zoning map from his city archives that helped prove his property was being taxed incorrectly.

Did the book provide enough information to get started such as contracts, tax liability information? 

These two things can do worlds of good for a high net worth investor looking to maximize tax- deferred/tax-free growth and minimize general taxes from operations.

I know the IRS asks about entity vs personal members and if they're foreign or not specifically on the 1065 and other tax forms. 

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

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).