The median home price in Florida is $410,000. At 80% LTV, the typical loan is $328,000 at the current 6.90% average rate, producing a monthly P+I payment of $2,160. Total interest over 30 years at this rate: $449,675.
Property taxes in Florida average 0.89% of assessed value, or $3,649 per year on the median home. This adds $304/month to your all-in housing cost. When evaluating a refinance, factor in property tax and insurance for a complete picture.
Florida has no state income tax, so there is no state-level mortgage interest deduction. The federal deduction still applies on loans up to $750,000 for itemizers.