My realtor is worth his weight in gold and works very hard when I have a deal going with him.

The rest "should be" (if bought properly), paid for by someone or something else. 

Take ownership of your mistake and learn to do the proper due diligence recommended above😊

If so, make sure agreement is in writing, signed by both parties, specifies new end date and ensures any existing security deposit will still be dealt with properly per landlord/tenant laws, and I'd also ask for a partial payment to be issued at signing to make obtaining his new place easier.  

You might add the weighted interest you are currently paying, to see if you actually save money by refinancing your primary.For your 1st investment property, if you want to do a cash out Refinance on a DSCR type loan, you will need to get a minimum loan of $70,000, at 6.6%, you would need to have the property rented for a minimum of $900/mo, assuming taxes are about $2k/year, and Insurance is $750/yr. 

For newly constructed, purchased or renovated properties and also retroactive generally over the last 10 years, building components are properly classified into individual units of property and accurate recovery periods for computing depreciation deductions.

The installer did not remove the original weights from the original 100 year old windows nor did he insulate the weight shafts which is a must in Northern New Hampshire where temperatures often drop to -20.

They also do not have a proper screening process for tenants.

Without having the facts it sounds like there was not proper notice to the estate. 

Rotting window frames, unsafe electrical issues, a tub and sink that didn’t drain properly, a promised dishwasher that turned out to be broken and unusable, a driveway with tons of pot holes so deep that they could have easily damaged cars, and much, much more.