美国采购需求：价格有竞争力的豪华集装箱房屋，折叠式集装箱房屋，准备运输的集装箱房屋，可扩展的集装箱房屋

I'm looking for a 3-bedroom option that's budget-friendly. Ideally, the units should offer good value without compromising on basic quality and comfort. I need to understand more about what you have available, including size options, layout possibilities, and any extra features that could make them stand out. Please provide details about pricing and any bulk purchase discounts you might offer. I'm particularly interested in items that maintain durability while still being cost-effective. If you have options for customization or upgrades, let me know as well. Looking forward to your prompt response with the specifics!