How a Straw bale. (using local straw bales as building blocks). This may sound crazy, the method is gaining more credability, not just as an eco-build option. There are now many books on the subject. Grand Designs programme, channel 4 followed a couple how did just this in France. The beauty of this system of building is the speed, reduced env impact and for you cost. You can also render, with aid of chicken wire ontop. Would work well with a timber frame too. You may have to do a bit of research via internet, books. And check with marie, they allow this style. But it is totally aaceptable and beautiful in my opinion. There is a great book out ; Strawbale houseplans/ J Bingham. C F Smith. Gibbs smith publisher. Lots of lovely pics inside. Bestest