It’s kind of exciting to see how all of this will play out over the next few years.

If you play around with the numbers you can try to maximize cash out and keep it cash flow neutral, assuming rents don't go much below where they are now.Your tenants would be paying down the mortgage and you would potentially be making money on that equity.Of course you want to be responsible and have ample reserves.

I've read some of the forums that say in Florida this will turn into a long term tenant at that time and the landlord laws come into play. 

You can see how this plays together.

While i'm not working, I enjoy reading, biking, hiking, playing rugby, auto racing and much more. 

While i'm not working, I enjoy reading, biking, hiking, playing rugby, auto racing and much more. 

I recommend cleaning it up well and having professional pictures taken for advertising, schedule showings on the same day or weekend in time slots, advertise through all means you can think of: Zillow, apartments.com, trulia, cozy etc.

Are you trying to do this locally or from a distance as that plays a big role.

For example:A clear or black (if you don't want anyone to see what's inside) acrylic wall-mounted suggestion box (both of which fit the dimensions you listed and even have a slot at the top for running wires out of):Link to product: Clear Suggestion BoxLink to product: Black suggestion boxOr just a plain acrylic lockable box that comes in various sizes:Link to product: Clear acrylic boxI wouldn't think it'd need to be anything too fancy or expensive.  

But if you’ve got cash, waiting a bit for things to play out and cool down may be a wise move.