I was considering a
straw bale house when I lived in Nebraska, about 15 years ago. The Midwest is an excellent site for straw bale, because it
1. Has a dry climate
2. Is free of termites
3. Has wide extremes of temperature
4. Has an abundance of cheap straw
Unfortunately, the internet wasn't as well-developed then as it is now, so it was much harder to get information on alternative building techniques in the early 00s.
If you can lift the bales and perform some of the electrical and plumbing work yourself, you'll save most of the building costs. There are even cooperative groups in the Midwest that work together to teach the technique as they build homes. You help other members build their homes as you get on the list. When your turn comes, waiting members help you build your home. It helps you get your home constructed faster while taking some of the guesswork out.
Good luck and safe building!