The units are 6 duplexes so separating them is doable to an investor for longer term gain but not in our cards because the bank loan and their unwillingness to let us pay off the loan one sell at a time until our loan is satisfied.

Challenges?

All have their own challenges and opportunities.

Now something specific about the 70% rule: when the market is hot like it is now, finding 70% rule properties are a challenge. 

The first challenge I ran into was insurance related.

Depends if you are renting ST or LT; depends what's your downpayment; in general, it is always challenging to cash flow upon purchase in South Florida (simply too much demand here most of the time..,).

So if you're okay to potentially lose $5k and you think the deal has enough room, I would pull the trigger.It is definitely a challenge finding a GC that will be on budget in Tampa.

Maybe their landlord is terrible, but it has me wondering if they might just be very challenging tenants.

@Cat Storing it sounds like you are well on your way, but I would challenge you to redefine "getting started".

Challenges?