Roundwood timberframe strawbale

If anyone could give tips on how this can work I'm all ears.

So my wife and I are working on building a octodecagon (18 sided) roundwood timberframe house with a basement, and 2.5 floors, the standing timbers would be 3ft± in diameter the height of the timbers would 30ft±. I am trying to use little to no concrete at all and would like to have pointers on how to even setup the foundation given the shape it has. The sqft of the whole thing is 12,000+ with all floors combined with the basement alone being 3295sqft in size. I don't want a slab for the basement because I wanted to use stones to support the weight of the frame and have the floor of the basement be an earthen floor. Any info you need to help get a better picture just ask, I'm just hate asking a machine to give good advice thanks 😊

What an undertaking! The closest thing it reminds me of is the Sivananda Lodge in Quebec. It is featured in the book "serious straw bale" by Michel Bergeron and Paul Lacinski, though they did not do a basement, but it is colossal as well at 8,000 square feel I think. He didn't do round timber, but modified post and beam with squared beams. You might look into the build and see if you can't track down more info on it.

May I ask why strawbale for such a massive building? It will need heavy construction equipment, serious foundation work and extreme amount of pest proofing and plasterwork, but still is just straw after all. Have you thought about the SIRE wall?

Now that is an undertaking. Are you in the United States? If so what state? Many answers might be dependent on your location. My house is modest in size and three of them would fit on each floor of your proposed home. A structure of that size would require engineering in Oregon.