None of us are architects or builders, a this point, but we know clearly that we want to build, as much as feasible, with natural materials and locally available resources. 

In this spirit, we recently got the kind permission to gather and take a fair amount of left-over logs from a neighbouring Teak plantation (on the other side of the road), which are going to be used in the structural frameworks of our kitchen-dining space, and in guest cabins for our hosting area.
Apart from that lucky, but labour-intensive gift, we have considered river-rock-raised floors capped off with a clay-sand-limestone-cement plaster, low earthbag walls (up to 1-1,5m), left-over Teak planks or bamboo-panels for walls, with insect screen or glass for windows. 
In short, initially, rustic accomodations that we will, over the years, improve upon, both in terms of easthetic appeal, as well as in durability and sustainability. 
Their primary purpose is to offer shadow and shelter and a relatively mosquito-free abode, while allowing lots of air and light to pass through, surrounded by plenty of trees, edible shrubs, herb spirals, and expansive forest-views, with the peaceful rustling of flowing water in the background, bringing relaxation and tranquility.
If, or once feasible, we would like to incorporate sacred geometry principles and organic shapes/forms into our homes and buildings, so that they look and feel right in the landscape,and in our bodies.