Walls made of Styrodur or Styrofoam?

I want to build a small house using lightweight construction methods. It should be normally habitable but must weigh very, very little for certain reasons. The house will be single-story, with a maximum of one upper floor. But then only one room as the upper floor. I do NOT need building permits or structural calculations. Initially, a wooden half-timbered frame was planned. Simple studwork made of wood, with Isover insulation in the studs, a vapor barrier and drywall on the inside, a diffusion-open roofing membrane on the outside, and cladding made of wood (or similar). Done. Now I have seen that someone built a house out of laminate. But it looks as if the walls are glued from Styrodur (or another brand) and then covered with laminate. Shouldn't it also work without laminate? For example, by gluing together 20 cm Styrodur blocks? Do windows hold in that? What is your opinion/solution to my problem. I probably cannot upload photos yet?????

Walls ONLY made of Styrodur or Styropor? Seriously now? How is that supposed to hold? Have you ever had, for example, a bicycle topple over and fall against a wall insulated with Styropor? That will likely cause nice holes in the insulation, even if the plaster above it was stabilized with a plaster mesh... I can't imagine that this construction method will hold...

Sure, the house you saw was not built from styrofoam blocks that were finally filled with concrete? A pure styrofoam house will not support the roof permanently. How big is the "house" supposed to be? Actually a residential house where windows are to be installed, or just a garden shed? Or as a superstructure on a houseboat? Although Archimedes helps here, meaning the weight does not play too big a role. What is the targeted "weight goal"?

that would interest me too, for what reasons is the house allowed to "weigh very very little?"

After all, it is..... a house?!

Yes, it is about a real house with approximately 100 m². There is no limit to be undershot. It is only about max. lightweight construction. I know Styrodur, which is why I know it is very stable. Whether it still needs an internal gypsum shell and an external different protection is another matter. Unfortunately, I cannot attach photos, otherwise I would show a model house that is self-supporting and stiffens itself.

Photo (or is it possible after all?)