I am exploring options - sell his place, use is as a rental or take some equity out if it to purchase another property (I was thinking maybe a short term rental on the lake)?

I've always gotten the "feeling" that they are trying to do the right thing.1 or 2 clients having an issue with a builder is understandable. 15 is at best, professional negligence.

Now, the house that is about to refinance, I am thinking of turning into a MTR for traveling nurses, or other professionals as such.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I imagine it can be tricky without face-to-face interaction, but it sounds like you’ve got a solid approach.Honestly, I don't have a process for establishing trust with sellers other than being polite and professional.

HVAC is old but functions - ask for seller to get them professionally serviced if it is not done yearly. 

Look for professionals who understand the unique needs of real estate investors.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

You will also discover the warranties don't cover as much as you think, and claims are often denied.Home warranties are so bad that most professional property managers will not manage a property with one in place.