Ideas for small cabin (plot 4)

Here are some ideas I have for me and my brother's cabin. It takes the design from Resolution: 4 Architecture but has a few key additions to make the place "green." (Click on the pictures to read my ideas)

Green Components
- Solar panels on rooftop (enough southern facing roof space for 2-3 kilowatt system)
- Solar thermal collector and pipes on rooftop (at least 200 s/f of roof space) for hot water
- Radiant floor heating
- Recycled or composite stone for exterior foundation and fireplaces
- Reclaimed and/or renewable timber for mantels, trim, and floors
- Concrete mixed with slag or fly ash
- Low VOC adhesives and sealants and no-VOC paints
- Roof, wall, and floor insulation