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I'm looking to get a quotation for a one-storey apartment measuring 12 x 8 metres. The design should include a bedroom on each floor, with a focus on maximizing space and comfort. I'd appreciate details on the materials you recommend, as well as any additional features that could enhance the living experience. Please include pricing information, estimated manufacturing and delivery timelines, and any options for customizations. I'm particularly interested in sustainable materials, so if you have any eco-friendly options available, do let me know. Looking forward to your detailed proposal!