Knowing cap-x projected out years is not an "extra credit" kind of information, it's fundamental necessity. 

It's easy to obtain, costs very little, and doesn't require extra, on-going effort to maintain.

Or, He tells the truth and explains that he sold you the property, and "please remove the loan from his credit report".

For some extra context, their lease expires in about 5 months, so this landlord transition happened midway through their leases. 

I’d plan for extra amenities like special decor or concierge services. 

Since the properties are in New York you have a few extra steps you need to do to keep all of your funds out of NYs hands at closing.Here's an interesting BP thread on the South Carolina property tax issue you mentioned. https://www.biggerpockets.com/forums/725/topics/604427-south.... 

It’s all about what will draw guests in and make them choose your listing over others.2️⃣ Standout Amenities: Rentals that offer something extra, like a hot tub, game room, or eye-catching design, often attract more bookings and higher rates.

The inspections have become so nitpicky over purely cosmetic items there has to be an extra $1-2k per year to keep up with the punch list every 1-2 years.

I allow pets and charge a pet rent of $35 a month, its nice bit of extra money and pet owners tend to stay longer as tenants.

Requiring occupant to have renters insurance is another possibility for extra protection.