Home prices in Austin run 17% above the national median: $490,000 versus $420,000. Relative to the $82,000 median household income here, the price-to-income ratio comes out to 6.0x.
Austin's 1.97% property tax rate runs above the 1.1% national average. That's $804/month on the median home here, not a rounding error against the mortgage payment.
Texas charges no state income tax. Every dollar of the $82,000 median household income here converts more directly into covering the $3,549/month payment.
Austin's cost of living index is 115, above the 100 national baseline. That's on top of the housing numbers above, not instead of them.
Austin's median home price runs 58% higher than nearby Houston: $310,000 there versus $490,000 here.