What kind of winds (every-day, seasonal, monsoon) do you get in your part of Thailand? It looks like a very top heavy design, esp w tile roofing. How will you anchor the blding to foundation and ground, and roof to walls? Can you plant any windbreaks?
When you build the larger house with the same amount (1 meter) roof overhang the mass of the bulding will be proportionatly larger and provide better stability.
Oh, I see you're an engineer so you probably know this.
Steve
