<p>I'm surprised no one has mentioned this, but you could also save money by going to Texas Tech for your first two years, and then transferring to a more expensive school for your last two years if you felt it was necessary for whatever reason. I actually think that is not all that bad an idea because interests and major plans often change. </p>
<p>I do not think there is anything wrong with a last minute change of plans if your doubts are sincere. Colleges know this happens, in fact, they plan for it. Follow what feels best for you, and go for it. Best of luck!</p>