You should have never bought a single unit rental unit house unless you could start off with several. 

(not so important but if they only require 15% down on a single family home that is usually a good sign that you are working with a flexible lender) Can I change title to my LLC?

QB Reports doesn't generate this for you, but you can easily download their reports into a spreadsheet and add a single line for the initial investment and generate your cash-on-cash return any time.  

You live there for 2 out of 5 years and sell tax free for 250k in gains free if single or 500k if married.Other option is 1031 exchange where you use a qualified intermediary to roll off your sale proceeds into another property.

We are looking to invest in a single family home that would serve as a vacation property in Florida. 

You might make the most popular push a single family rentals and they are just too risky. 

Because there are not too many multifamilies in the area, I'm currently looking to buy a 2 level single family house and build a second kitchen on the second floor, just like @Ron Gallagher recommended, but not in the basement, in the second floor.

LOI’s aren’t used with single family homes, no need for them and they serve no purpose on s sfh, just make an offer. 

They are interested in a lease option (rent to own) on a single famIly home.

Financial issues are possibly the single biggest issue the Military as a whole has to deal with that affects readiness.