In my personal experiences a lot of structural items start with bad drainage.

As another poster mentioned rates are lower than they've been in the previous 18+ months but unless some very surprising economic data comes out between now and when you did your refi it seems unlikely that rates are going up in the short term and there is at least a decent chance that rates drop a little more before then. 

Be more thorough with your turnover process.

Then you can read a more in-depth book like The Book On Rental Property Investing by Brandon Turner or The Unofficial Guide to Real Estate Investing by Spencer Strauss.2.

When I first started, I focused a lot on learning and networking too.

Don't bite of more than you can chew. 

There are some things going on you will want to be careful of, Daytona has banned STR in many areas and the Condos...special assessments for certain ages and styles after the Miami incident have made a lot of them unaffordable.

Other than that, you will need to network with a lot of people to find seller finance deals.

Take your excellent team members aside and pay them a lot more than you need to.  

Give The Ultimate Guide to Grading Cleveland Neighborhoods a read.