If you click on the individual owner page there is an error but you can still submit an application to list and you can still see listings so there is nothing  indicating that they are stopping operation that I could see. 

Start by simply checking for water stains on the ceiling, which can indicate whether the roof is structurally sound.Many mobile homes have rolled metal roofs that can crack and rust over time.

I would find a market with good median rents, and low home costs, and a location that has some indicators that would support future price growth (pop growth, job growth, large businesses/employers moving there).

The answers will indicate how well you did.1.

The fact that you asked this question indicates you would likely be better off with a turnkey investment. 

Most investors who focus their underwriting on successfully completing the BRRRR method ignore the fundamentals that are most indicative of a properties long term success.

I reminded him he signed a document with the trust attorney indicating he was good with the terms (it was also ~2 years after the sale had closed).  

A tenant complaining online might indicate that the property manager handled them appropriately, so be sure to ask the manager for their side of the story.7.

I 2nd what @Jonathan Greene indicated.  

A few owners indicated they have been at 320-330 days rented for several years.