Unless you will have jobs waiting for you, you might consider putting the truck in Park, a few hundred miles before you get to Florida ---- like somewhere in Middle TN or East TN
First and foremost, you need to check what homeowners insurance will be. Since all the big storms in these last ten years, a few of the "A" rated insurance companies have pulled out of Florida.
IF you can get HO coverage, it's most likely going to be thru the roof in terms of price and very little coverage in return. The same might hold true for auto coverage and if you have jewelery, expensive saddles, etc that need to be put on an Inland Marine policy.
C.O.L.A. Is a LOT higher in Florida than Tennessee. When you fly down, compare prices on the items you buy weekly for yourselves and your horses. Compare gas prices.
I retired from the OH/PA border so I completely understand why you might want to get out of Michigan but honestly with all due respect to life-long Florida residents, a transplant that's lived in Florida with horses for more than three years, needs to come in and say why they think life in FL is better and cheaper than life in TN
That all being said, if you mind is truly made up on moving to Florida, you really do need to be sure you can get homeowner coverage at a reasonable cost, with a quality company, in the area you want to settle:)