Dear Grit,
Since you're still planning your build, you might install an extra window or two in positions that would allow your wife to see she's not so closed in.
Our teardrop has windows only in the two cabin doors. I'm a bit claustrophobic, too, and wondered if I could be comfortable in the cabin at night. It has not been a problem. After getting into bed at night and turning off the lights, I reach over and make sure there's a small gap in the curtain through which I can see outside.
I've come to think of our teardrop as a little silver cocoon, quiet (the insulation also soundproofs) and protective against both the elements and also things that go bump/growl/screech in the night.
Tell your wife there's at least one teardropping claustrophobe who's so comfortable she finds it easy to sleep in on camping mornings, that'll appeal to her!
Thank you for your service to our great country! Come home safe and well!':applause:
Linda
Quincy, CA