The mom and pop landlord that I rented from (by my calculation and internet research) owned about 50 doors and had for a long time.

Do some quick research on the internet and you will see what I mean. 

In a rental I manage, we did see about a 40% higher rent for a furnished unit, but may see some higher vacancy periods and tenants probably expect more included (utilities, internet, etc), but agree it's something to consider.

Seems to me that it is such a small town that there isn't too much info on the internet.

Use internet tools such as BiggerPockets, Graham Stephan's and Meet Kevin's YouTube channels, and BiggerPockets Pro online courses.

To locate tenants, contact real estate agents or property managers, or use internet platforms such as Zillow Rental Manager or Apartments.com.

He claims they are verifiable online and that I should be comfortable doing business over the phone and internet.

Please tell me you are frickin kidding....This is the stupidest thing I have read on the internet today.Tenants have the right to have their owner political views that differ from yours.

When traveling, the internet access was indispensable.

I would highly recommend bringing in an advisor or broker with specific experience and knowledge in this asset class.I have seen many of these parks trade hands on a handshake and a dream, however, you could be taking a huge gamble if you don't get microscopic on the front end.