The median home price in Tennessee is $330,000. At 80% LTV, the typical loan is $264,000 at the current 6.90% average rate, producing a monthly P+I payment of $1,739. Total interest over 30 years at this rate: $361,934.
Property taxes in Tennessee average 0.71% of assessed value, or $2,343 per year on the median home. This adds $195/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.