At what point does a region like Dallas, which is so heavily dependent on road infrastructure, start to buckle under its fractured tax environment?
What I'm getting at is, yes - Texas metros may be
relatively cheap now, while they're still enjoying "rounds 1 and 2" of Federally-funded highways and developer-funded subdivision roads. But alllll those roads are expensive to maintain in aggregate, and Texas doesn't have the means to pay for incrementally-increasing maintenance, outside of stupefyingly-high local property taxes. Which are likely only to get worse, as there's no way new revenue streams for the state to pay for maintenance will be allowed by a GOP-controlled state government.
Same deal with public education: as I'm understanding it, the only source of funding for public schools in Texas is an M&O property tax levied on local taxable values. That's
ridiculous. And will become unmanageable for certain municipalities attractive to middle class families.
A Dallas with 15+ million people would quite likely be a Dallas of 30+ million cars driving on aging roads and bridges, to and from aging suburbs with weak local tax bases and underfunded public schools, ringed by new-construction ex-exurbs filled with out-of-state transplants. And that assumes gas prices stay low enough to allow for continued cheap personal driving. Because if they don't, then this discussion is a nonstarter. Dallas isn't as bad a Phoenix, but new construction and the jobs associated with it make up a sizeable percentage of the regional economy. When "new growth" is no longer a leading sector, the whole economic equation is forced to change.
EDIT:
Examples in property tax disparities:
$874,750, 3,725 sq foot house in Southlake, TX (Dallas): $14,580 a year in property taxes
$1,050,000, 3,647 sq foot house in Plainville, MA (Boston): $10,152 a year in property taxes
$939,000, 3,654 sq foot house in Coppell, TX (Dallas): $14,560 a year in property taxes
$919,000, 4,175 sq foot house in Franklin, MA (Boston): $9,615 a year in property taxes