National median home price is $410k[1]. Texas is less than $300k[2]. Only thing that's unrealistic is most people who buy a house for $400k will probably get an FHA loan and put 3% down so will have a higher payment because of (1) mortgage insurance and (2) borrowing more money.

[1]: https://fred.stlouisfed.org/series/MSPUS [2]: https://www.zillow.com/home-values/6915/san-antonio-tx/