I find the Austin new homes market can be pretty unpredictable these days. For those that are not that enticed by the already-established homes, they can still find affordable methods for getting their own built. If you plan to go that route, I suggest taking plenty of time to find some decent home builders. You need to take time to check their experience, see what they've built, and see how much they charge.
Most importantly, you need to make sure they are licensed and bonded. You don't want to end up having to a pay a lot if something goes wrong. This is to protect you and them.
I think that getting a good builder is crucial. You're the one that will have to live there. If that's the case, why not do it right the first time?