$850,000 buys the median home in Franklin right now. With 20% down, that's a $170,000 down payment and a $680,000 loan, set against a $155,000 median household income.
At a 0.6% effective rate, Franklin property taxes add $425 to the monthly payment on the median home, $5,100 a year in total.
Tennessee charges no state income tax. Every dollar of the $155,000 median household income here converts more directly into covering the $5,187/month payment.
Franklin's cost of living index is 166, above the 100 national baseline. That's on top of the housing numbers above, not instead of them.
Franklin's median home price runs 89% higher than nearby Nashville: $450,000 there versus $850,000 here.