The current owner has to dig the floor out and replace the floor to meet spec.  

In New Hampshire, title laws are strict, so we couldn’t move forward without obtaining a signature from a living heir.The title company dug deep and eventually located a distant relative—a niece of the deceased owner, two generations removed.

@Christopher J Driscoll did offer some great insight from his experience with ADU's as an architect and property owner.

Unless you believe the owners knew in advance that this model would not work and were doing this to just feather their nest and move on ?

.), Peter Thiel (Palantir, Founders Fund; Palantir valuation: $45B), Reid Hoffman (LinkedIn, acquired by Microsoft for $26.2B), Max Levchin (Affirm, valuation: ~$5B), and others like David Sacks (Yammer, acquired by Microsoft for $1.2B) and Steve Chen/Chad Hurley/Jawed Karim (YouTube, acquired by Google for $1.65B), who collectively shaped the tech industry through groundbreaking venturesHigh performers who push one another, often go farther than solo business owners.

Can anyone recommend sources for contact information for property owners?

The requirement to do this generally involves an experienced GC signing on the borrowing entity as a 20+% owner thus making them a signatory on the loan and responsible for the debt which in most cases is not very easy to find.

I’m an investor and the owner of a property management company based in Kokomo, with portfolios extending into the Indianapolis area.

The 1 mile income radius could be misleading in either way to the positive or negative if the property is on the right or wrong "side of the tracks" so to speak.The 80% occupancy, if it's solely due to the mismanagement of the current owner could be an opportunity. 

All too typical park owner who took all the profit out of the park without reinvesting in the business then wants to sell you the potential he was too cheap to invest in.