You could sell everything off and live off the cash.You could learn about seller financing and sell your properties over time, collecting payments each month without having to deal with tenants and toilets.Have you looked for a local investor group? 

You should certainly start the process earlier than maturity, especially at the very least within a couple months of the maturity date - there can always be things that cause delays and pushes and even missing the maturity date by a couple weeks can have harmful consequences (since it will technically be a default / missed payment even if the lender is OK with it).Also, commercial loans even with the strictest prepayment protections / lockout periods will almost always have at least a 3-month open period prior to the Maturity Date

Note:  from a "buy" standpoint, unless you are all cash/heavy down payment, today's interest rates for investors in the 6%+ range don't cut it. 

We keep a credit on our account so we can just call down and order an inspection without having to either go there or wait til they get our payment. 

Gain immediate access to all of the Bootcamp's content upon payment and review on a schedule that best fits around you.Our Self-Guided Bootcamp will feature the following courses:Being a Real Estate RookieBeing a Rookie LandlordSTR or Short-Term RentalsInvesting in Multi-Family PropertiesHouse HackingCan't wait to jumpstart your investment success?

But you may be able to take over the mortgage payment from him. 

On the other hand, a cash-out refinance of your current duplex is another avenue to explore, albeit with considerations such as the risk of losing your low 3.5% interest rate and increasing your loan amount and monthly payment, thereby reducing your current positive cash flow.

. ;-)Attorney General’s legal action against Quality Loan Service results in payment to homeowners, delays foreclosures and stops deceptive practiceshttps://www.atg.wa.gov/news/news-releases/attorney-general-s... thanks for clarifying...if they were the players you had to contend with, i can see why the need for suit.

Be sure to lay out the terms clearly in writing, get signatures on everything, and hold payment until the final walk-through and key handover.

I was able to give them a warning, and was in a position to negotiate a purchase or refer them to someone who may be able to help them.I would explain their rights and what they could do to delay a foreclosure auction sale.They could:File a counter suit if they feel they have been wronged, that the bank did not credit payments on time.