It doesn't look very sturdy, which seems to be a wrong assumption on my part [1], but 20k for a decent house is nice...assuming you own the land already.
For comparison, how much do the Amish-houses cost (materials) and how long do they take to build them? I only know them from movies but they seem like low-cost/quickbuild type houses, too.
Edit: Building instructions for this could be a good application for a VR-based tutorial :)
[1]: "They're built more like airplanes than houses, which allows us to have them far exceed structural requirements. ... We're using material much more efficiently. But the problem is your local code official doesn't understand that. They look at the documents, and the house is immediately denied a permit simply because the code officials didn't understand it."
Edit: Building instructions for this could be a good application for a VR-based tutorial :)
[1]: "They're built more like airplanes than houses, which allows us to have them far exceed structural requirements. ... We're using material much more efficiently. But the problem is your local code official doesn't understand that. They look at the documents, and the house is immediately denied a permit simply because the code officials didn't understand it."