I decided to start a new tread for my building since my other treads discussed other plans, and i also see my last updates with photos was lost here. After looking and discussing different plans i had to start all over when my wife wanted to buy two old wood houses on two trucks who stopped outside near or home eating their lunch.
The new plan is 147sqm x2, and kind of a mix of ideas and materials: ground floor is cement/blocks, second floor are wood post whith wood flooring, and there will be some wood walls. Outside will be sherawood. Windows are upvc, roofing is steel and will use metal bluescoope metal roof. Here is photos from first month of building.