You always have the option of walking away.My recommended course of action is that you extend the contract so that you get YOUR OWN hvac guy can get out to take a look.Your hvac guy won't mind the quick and easy job of diagnosis, give him an hour or two of work, have him write up a lightly padded repair estimate and hand that over to the seller and ask for that amount to be credited.

Looking to buy a SFH in one of these counties, with the intent to convert a basement into an ADU and rent it out (short or long term) - and live in the main unit as owner-occupied.

I was living in Austin at that time and the property was in Houston.

each of  them lived 100 years  !!!

We have a hospital nearby and some of the physicians work 7-on 7-off and live a few hours away.

Even if they choose to stay, it can create friction because you're the mean landlord that just increased their living expenses.

I live in Southampton, but I do not believe here is the best area to do wholesale, but I will be doing it in NY either way.

I live in Madison. 

The unit I want to occupy has 3 people living in it, when is it safe to give them a notice to vacate and does anyone have a template for this?  

They have now stopped repling to our commications since I told them that they would not have the option of extending their lease at the end of the six month term [option to extend was contingent on 6 on time monthly payments].