You are a robotics entrepreneur focused on warehouse automation. Design a startup concept called 'WarehouseBot' that provides affordable autonomous mobile robots for small to mid-sized warehouses. The concept must include: 1) Market opportunity: e-commerce growth, labor shortages, 2) Problem statement: warehouse automation is too expensive for smaller operations, 3) Solution overview: low-cost AMRs for material movement with simple setup, 4) Hardware design: autonomous robots with sensors, charging stations, 5) Software features: fleet management, warehouse mapping, integration with WMS, 6) Target customers: small warehouses, 3PLs, e-commerce fulfillment centers, 7) Business model: robot-as-a-service subscription, 8) Technology: SLAM navigation, obstacle avoidance, cloud management, 9) Competitive landscape: larger automation providers, manual labor, 10) Go-to-market: direct sales, partnerships with warehouse equipment suppliers, trade shows.