Whether you're looking for short-term rentals, long-term rentals, or fix-and-flips, Florida has something to offer.Favorable Tax Environment: Florida boasts no state income tax, making it an attractive option for investors looking to maximize their returns.Year-Round Appeal: Unlike seasonal markets, Florida offers consistent rental demand year-round.

Note - if you live in your property for 2 years out of the last 5, then you don’t pay taxes on the profit. 

I have 2 options:- finance the construction pre-selling the apt, and take my profits (expected to be around 700K pre-tax); or- finance the construction with a 6-7%/year loan (collateral = my house), keep the 10 units, and once the building is completed in 24 months, rent them for circa 180K/ year gross.

You might not cash flow right away, but even just offsetting what you were paying in rent while building equity, getting tax benefits, and learning how to be a landlord is a game changer.

Also, you will have additional occupancy tax depending whether you are in the city limits or not.

@Andrey ShostakA tax calculator would be nice.

In addition cash flow is taxed annually.  

Plus, compared to other parts of Florida, the Panhandle is still relatively affordable, making it a great option for first-time investors or those looking to diversify their portfolio.Another huge perk is Florida’s no state income tax and landlord-friendly laws, which make it easier to manage and profit from rental properties.

The high property taxes takes out most of the profits. 

Anything that was not paid back after the first 6 months accumulated 1% per month ($500) to the balance owed.