I am building a clay- and strawbalehouse in Fri & fro (an ownerbuilder association or small ecovillage) – and I still have to finish some walls with clay plaster (beginning from springtime).
I am 57 and I build for me and my son of 12 and daughter of 10 when they are staying with me.
If you are interested in organic design and materials there are a few things to learn here. Also some work with wood and other materials.