The median home price in Tennessee is $336,508. At 80% LTV, the typical loan is $269,206 at the current 6.76% average rate, producing a monthly P+I payment of $1,748. Total interest over 30 years at this rate: $360,022.
Property taxes in Tennessee average 0.52% of assessed value, or $1,750 per year on the median home. This adds $146/month to your all-in housing cost. When evaluating a refinance, factor in property tax and insurance for a complete picture.
Tennessee 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.