It's not so much a cost of living issue but more of "Im in my 30s and am I moving to get drunk and fat or for professional reasons"?I can confirm that both of those things are true. I live ~40 min from Austin. The part of Austin that people get so crazy about (the quirky-ness and music) is actually quite small, and only considered quirky because it's surrounded by more conservative minded communities.
Someone else mentioned it matters how much you're actually making, but I'm sure there are plenty of cost of living calculators out there on the internet.