This is basically a mobile home, which has no foundation. As such, there is nothing in the design which is not easily re-built to your spec. The design is inherently modular. When you are dealing with a 200sq ft living space, its best to have it tailored to your own needs, and not a random or lowest common-denominator-based spec. The common areas, however take on more importance in a community or non-remote setting ans thus are the relevant areas to consider from an architecture perspective.
"Not a random or lowest-common-denominator-based spec"
So you want it to cost what a 1,200 sqft building would cost, but you want to spend it on architects and custom builders instead of cheap efficient standardized parts & designs.
A wheelchair ramp, sure I guess... but the general principle of housing for most of us can't be "Find a way to occupy the unemployed architecture majors of the world".
No, the house in the article was built for $11,000 dollars. That's the cost of provisioning about 5 square feet of London real estate. You're mis-reading be-tween the lines, by a couple orders of magnitude.
