$510,000 buys the median home in Plano right now. With 20% down, that's a $102,000 down payment and a $408,000 loan, set against a $98,000 median household income.
Plano's 2.05% property tax rate runs above the 1.1% national average. That's $871/month on the median home here, not a rounding error against the mortgage payment.
No state income tax in Texas means the $98,000 median household income stretches further than the same salary would in an income-tax state, which matters directly against a $3,728/month payment.
Day-to-day expenses in Plano track at 110 against the national 100 baseline, above average once you look past the mortgage payment itself.
Plano's median home price runs 65% higher than nearby Houston: $310,000 there versus $510,000 here.