Any overall tips on red flags to avoid while interviewing PMs I might have missed?

That would still make this a nearly 2% rule, which in today's market typically means war zone.

RV/Trailer Park (pros: profitable with medium investment upfront | cons: lots of regulatory permits needed, and again not in an "activity" zone per se)5.

Zoned for multi-family but the seller was using the property as a single-family.

Also with converting a garage to an additional dwelling unit there can be permits and zoning to be concerned about so factor that into what you would have to learn about if you have not handled that before. 

Im looking to buy a home in Tampa FL and put an offer for a standard cookie cutter home in a non flood zone 2/1 SFR.

But according to the inspector, everything that was marked " red "so to speak was not fixed after the initial inspection. 

In building our new "core four" for looking for future properties is this a win-win or a red flag to have 3 of the 4 core team members in the same person/family?

Purchase price: $271,000 Cash invested: $18,000 This purchase included a 3400 sqft duplex and a piece of vacant land next door that is zoned for another duplex right in the heart of Oklahoma City.

If the property is zoned in such a way that the structure is legal then it is likely that the city would allow you to split the electric and have two seperate meters.