Your Ideas Count

1. I would use wood because it's good for the walls in the house and it's well insulated for winter.
2. Concrete tiles for the kitchen floor,toilet floor,garage. because it's easy to sweep up mess and it has great texture.
3. Carpet for the floors on the stairs,sitting room,Bed rooms, so you can have a comfortable surface for your feet.
4. Metal layer / Brick top Roof so the rain and the cold air doesn't get into the house.
5. wool inside the walls to keep the house warm in winter, and night times.
6. Put Wires and Inputs inside the walls so you wont get electric shocked.
7. water pipes for toilet,kitchen sink,outside tap.