You may want to consider a
system built house. These are quite popular in Switzerland and represent a considerable saving. The dimensions can be altered to s fit your land and wall, fittings, specs can be changed to your requirements.
We used
http://www.pewihaus.ch/ last year and were very happy with them. Based north of Zurich system built.
Or an architect/developers company we used 12 years ago:
http://www.uster-ag.ch Based in Wädenswil. Slow, but methodical.
But all dealings were in
German. Frankly you may find an English-speaker at the above or other firms, but all the specifications and quotes will be in German...