Funny, a couple of hours ago I was reading about the median household income in Texas.
According to this website* it was $56,500 in 2016. Apparently, there's no income tax but you still pay some taxes and are left with a net pay of $46,500 (I have no idea how this works in the US).
I couldn't find something representative about the cost of living for a familiy of 4. Too much variation.
I'm curious because I saw a video about how a typical texas household is able to save a couple of thousand dollars per month. I'm not sure if that's true or not.
*https://www.deptofnumbers.com/income/texas/#family