Thank you for your response. Based on your preference for a minimalist style and your budget of 400,000 euro, I can suggest a design that emphasizes simplicity, clean lines, and a focus on functionality. For the exterior, we can use a simple geometric form with a clean and minimalistic facade. We can incorporate large windows to allow ample natural light and a connection to the outdoors. Regarding the interior, we can create an open floor plan with an emphasis on functionality and simplicity. We can use neutral colors with natural materials such as wood, stone, and concrete to provide a warm and inviting feel to the space. In terms of functionality and room arrangement, we can create an open living, dining, and kitchen space that encourages social interaction and a connection to the outdoors. Additionally, we can include private areas such as bedrooms, bathrooms, and a study to provide personal space and privacy. To optimize the use of the budget, we can consider using energy-efficient materials and technologies to minimize operating costs and reduce the carbon footprint of the building. If there are any specific materials or technologies that you would like to incorporate into the design, or any other additional preferences, please let me know.