Depends on your number 

It is a pretty diverse area and depends on the specific street.

The Health District in my view is bounded by:I-95 to the EastDolphin Expressway to the SouthNW 14th Ave to the WestNW 20th St to the NorthProperties within these boundaries are limited/rare, so while the above is the 'actual area' I also mean the surrounding neighborhoods and streets.The area doesn't have the best reputation in terms of safety (Though there are definitely rougher areas in the city), but it does seem like it a solid rental market - with plenty of jobs nearby.It is also fairly close (Depending on traffic) to Wynwood, Downtown, and Little Havana/stadium(s) and the airport.  

Being that this is a smaller park near an airport, it may not be the best deal depending on your exit strategy.

Aside from predicting the future, how can I change my process so that these letters come in a more timely fashion?

How you do this depends on what you want for an outcome. 

That depends.6.

Depending on your income it can, look up house hacking.  

has anyone ever had a dependent on a lease that prevented them from evicting?

The earnest money is not always yours,Depending on the parameters of the contract and rider there could be a clause that states that protects the earnest money.