I hope you have sufficient capital for the maintenance issues they tend to have.For such an apparently large firm, it seem strange that you seek advice on how to operate a property from an online forum. 

Keep in mind, for FHA, 3-4 unit homes must pass the FHA self sufficiency test.

Than it does for me to say "We couldn't come to an agreement with the other group so we are crawling back to you asking if maybe you could possibly offer us XYZ"...On the same token one of the reasons you get in the multiple offer situation is because the minute your offer came in, the selling agent called everyone who looked at the house and said "Hey I know you showed the house last Tuesday...Just to let you know we just got an offer and if your clients are interested I am presenting tomorrow morning at 10:30....

A simple email stating you have decided to use another contractor is sufficient. 

New listings of single-family rentals rose 18.4 percent in June, providing a sufficient supply of homes to meet the steady demand.

We dont see your file so everything would be hypothetical at this point but you might encounter FHA SS rule (self sufficiency rule) if you're trying to do a 203k FHA loan on a 3-4 unit property so make sure you know all of these rules because they can be deal breakers depending on your specific property or income characteristics.

I'm having trouble finding any single family homes that cash flow sufficiently in the Kissimmee/Davenport FL areas just by using the basic monthly expenses. 

So, conservative CPAs are not uncommon.Simply identifying three replacement properties within the 45-day identification period is not sufficient.

Your basic insurance policy with $300,000 in liability coverage should be sufficient in 99.999% of all lawsuits.5.

As noted, if you are going hard money with a 1 yr term on the loan, you need to be sure you have sufficient equity in the deal to take the loan out.