re: Constructing the door

You’re not crazy at all. I’ve started making a few interior doors for my home as well for the same reasons. As I’m putting them into rooms with stained red oak woodwork, I’m using red oak. For stability and looks, I used quatersawn red oak. Here’s a picture…

I am further inspired to try my hand at sash windows, emboldened by this excellent little book, http://lostartpress.com/products/doormaking-and-window-making . Looking forward to the rest of your build!