Well, I don't know how unconventional it is, but could probably use a professional's going-over, as I built it with my adult child..
I know. Plans, and drawings and calculations should be part of the mix. But I built it *sigh* by the seat of my pants. Please don't throw tomatoes - I know there's a right way to do this stuff, and I didn't follow the plans/etc. I'm living in a no-permits area, and so I just went for it.
Very simple structure, a henge with another henge on the outside 8 feet away to make a wide corridor -circle in the middle is unroofed, has a door in, it's a courtyard. You've probably built a card house along the same lines. South side extended for a large kitchen, whole wall is windows between the 4x4s instead of siding. Floor was earth - then the cats ripped it to pieces no matter what I did, so I went to laytex-crete ferrocement with burlap. (lay down damp burlap, squish in laytexcrete mixture, paint over it with more laytexcrete to make smoothish surface. -Needs another layer painted on -Cats can't rip it up.) Roof built like a deck, with the intention of eventually building a deck up there, but - due to some personnel changes, I can't complete it. I love it, really, but oh my gosh as I get older I realize there's going to be a lot of upkeep and and I may have to even knock the whole thing down simply because I can't keep it up, probably won't ever be able to totally complete the project and won't be able to sell it either.