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I'm looking to purchase a 20ft two-bedroom apartment unit. Ideally, I'm interested in a well-designed layout that maximizes space and includes essential amenities. It would be great if you could provide details on the available designs, features, and any customization options. Additionally, please share the pricing, lead times for production, and shipping options. I'm also keen to know about the materials used for construction to ensure durability and sustainability. Looking forward to your prompt response with the relevant information!