Thankfully, Titan Bank addressed all of these concerns and I don't have to worry about it anymore.  

For more explanation of what they are feel free to read the many threads on Bigger Pockets concerning them.

You're free to wait 30+ years for them to die and hope their offspring feel different but global warming is quickly turning that desert into mars, so good luck getting anybody to move there.

If I were in your position, I wouldn't worry until proof of the contrary because you should be ok if the business is running well.

One note, one balance, one solitary headache to worry about.

In the meantime, you are more than welcome to use FlipperForce for free!

If you have just one unit it's not too hard to keep track of payments, you can do it for free in Excel or Google Sheets, you just have to stay on top of it.

Not sure the final outcome, but I'm guessing that is a case where you think things are risk free, but I expect the purchaser was out significant legal fees that were not reimbursed and ended up not getting the property.I've always thought about this in the rare instance that a super nice and super valuable property goes to sale with a mortgage on it. 

Or stay a second year and sell tax free. 

Feel free to reach out at my email.