I plan to pull a standard lease agreement from the Florida Supreme Court website and review it with her next week.I have received a new job opportunity where I will be making an extra 40k annually and must move out of my home quicker than I initially expected.

First, there are small grammatical issues with their website that could indicate it might have been built by someone whose native language isn't English. 

Quote from @Charles Evans: There are websites that estimate market rent, but they can be off quite a bit.

I don't mind setting things up on platforms like AirBNB and VBRO and even setting up my own website for direct bookings. 

@Bret Hudson: I've been a heavy user of both websites you mention and I find your comment interesting.

My state has a good court website where I can better do my own background checks for free so that isn't an issue.

There is a web site that lists all the section 8 housing, so people might be also be looking there. 

The websites were up and down all the time.

While podcasts, books, seminars, and websites offer general knowledge, you'll buy a specific property in a specific location, subject to local rules and regulations.

You can also print out the tracking information from the USPS website too.Given this, if a tenant asked for money back a year and a half later, I'd ignore the request.