You should be paying around $7k/year in interest, then (assuming 3.5%). You have no state income tax in TX so you aren't deducting that. Let's say your property tax is $5k (which is 2.5x what I'm paying on my $400k home). That puts you around the standard deduction. Unless you are donating a fortunate, in which case good on you, I don't see how you go up $8k (even ignoring the benefits you'll get from lower tax rates)
My home (interest and taxes) is about $18k. My 2016 did have a state tax deduction larger than normal due to a new car purchase pushing us up about $24k.