The median home price in Illinois is $299,900, 29% below the $420,000 national median. With a median household income of $83,211, the price-to-income ratio is 3.6x.
Property taxes in Illinois average 1.88% of assessed value, above the 1.1% national average. On the median home, that's $5,638 a year, or $470 added to the monthly payment.
Illinois levies a state income tax of 4.95% flat on top of the $2,128/month this mortgage runs. Model your real after-tax take-home before deciding how much payment you can carry.
Day-to-day expenses statewide track at 95 against the national 100 baseline, below average once you look past the mortgage payment itself.
Illinois's median home price runs 1% lower than Texas: $301,806 there versus $299,900 here.