Yes, a ton.

https://www.drhorton.com/texas/austin

> That could explain high profit while dissuading new construction in Austin.

Given they're still building a ton in Austin, there doesn't seem to be a dissuasion for building there. I do not have any idea about their average margin in the Austin market versus other markets though, but if that was a major decider on whether to build or not the answer is they're still choosing to build.