The occupants could be totally innocent 

Make sure property is in the sound shape and you understand the occupants.

. $500k at 10 cap x 5 years (big assumption on the cap rate I know) = $250k you could almost buy another small place with it.What I would advise is buy an existing property that's maybe poorly managed that needs fixing up or increase the occupancy rate and try not to buy on open market if possible.

My wife and I are considering a couple B&B in central Texas because the occupancy rate is astronomical

So, for you, with those 15 units in Fresno you should start with focusing on occupancy. 

South FL is a great place for vacation rentals though...our rates are much higher in comparison to other locations and we constantly have events popping up every month which keeps occupancy high as well as a surcharge in rates.

AirDnA will sell you in-depth AirBnB data about the area including average AirBnB rental price per night, average length of stay, occupancy rate, etc.

Definitely haunted.Make sure your posted notice to quit is addressed to "ALL OCCUPANTS".

With low-dollar properties like these you can end up with a ton of “we bought to rent this” and if it ticks over 50% you often take a value it (it hurts financing for future owner-occupants).3.)

My offer was above list and all cash with no contingencies and the bank chose to negotiate with an owner occupant.