If they have been paying well under market rent for a long time they may have a hard time suddenly managing a place at current market rents.

However, a few things you could do: You could talk with them & learn more of their story to figure out why their credit score is low as well as the type of people they are.

That is what you should expect from your tenants as well.

This is in Amsterdam, NY as well. 

I recommend you read some books on how to manage investments well.

How well do you understand how the taxes may change with the uncapping of the Taxable Value?

I'd love an update as well. 

The property was my primary residence for a decade and now functions as rental unit so I am happy with the purchase overall and it has worked out well.

They have equity in a property or two and are hesitant to deploy it.Other investors I have worked with have found if they deploy this equity into a newer property as 25% down payment, they are able to find deals that work very well. 

I rented out the additional bedrooms to friends and family, charging them well below market, and sold when it was time for my wife and I to start our own adventures.