Now I want to sell a handful of LTRs and buy another STR, this time preferably in Florida.

That's usually where I start, if I have a client that needs a point of recommendation, and I don't already have it.  

Thank you.I strongly recommend The Hands-Off Investor: An Insider’s Guide to Investing in Passive Real Estate Syndications, by Brian Burke.He also is active here on BiggerPockets: https://www.biggerpockets.com/users/cirrusav8or.

I have seen a few try to get started over there last several years, but none seem to have survived (or are really bad at SEO and marketing) since I was not able to find any the several times I have searched.That being said, I know Cadre has launched a secondaries market for their own investment offerings, but that is limited in scope to Cadre positions, and is currently closed anyways and will be "re-opening soon". 

I have bought and sold over 1,000 properties for my own inventory, and did Bigger Pockets Podcast #82, and have spoken coast to coast from Manhattan to San Francisco on real estate topics, and wrote a book on my experiences.So I can't say I did it all on SFH, but renting houses has been a big part of my real estate investments since I first started investing.

Owner occupied is a great way to start.  

I'm thinking of starting a property management company as I have a lot of skills I can leverage for this type of business.

Being an entrepreneur is primarily a role of knowing your strengths and recognizing your holes, then filling in people for those holes.Most all investment managers start with partnerships of two or three people that have complimentary skill sets, relationships, etc.  

I was trying to think of a reply that started with: "Septic issues? 

We collect all the necessary deal information upfront to give you the most accurate quote possible so nothing changes after the loan submission for underwriting to start.