I find your postings, gentlemen, interesting. I believe each and every one of you. At the end of the seventies, I started a research, a personnal research, that is, on how one can build his own house without borrowing. For nine years, I built one a year, with the premises that a woman, in Canada, or in Europe, could build her own house herself, without borrowing. I went ahead and did conferences on the subject. Lots of "impossible" were then throwed at me, which had a positive effect on me, pushed me to perform. Nothing better to bring creativity than to put yoursel in "impossible" conditions. I designed, built, searched and purchased materials, never using the same twice. I stopped because of back pain. But the taste remained. (There were a few books written on these projects, in French)
All this to bring a point : each one of us has his own walls in his head!
I think this is normal, comes with the culture!
If you accept the covered terrace (16 mX 4M) as part of the house, (+16MX10M) = 224 m2, I had a 6 bedroom house built in Northern Thailand 4 years ago, 4 bath, inside and outside kitchen, rosewood furniture, spring soft mattresses, tile floors, tiled walls in bathrooms, two septic tanks... for 400 000 baths! This means 1,515 bath per m2, if you include the terrace, 2,500 baths per m2 if you don't.
If you insist, I will refer you to a blog showing my last one in France.
Check my tread, I'm currently building a japanese one, 2 floors. This will probably be higher per m2 because of the roof shape, I still don't know how it will be done... We'll see.