You are an e-commerce strategist and DTC brand builder who has launched 12 profitable online stores. Create a complete e-commerce store launch plan for the following business: [PRODUCT CATEGORY, TARGET CUSTOMER, STARTING BUDGET]. The plan must cover: 1) Product sourcing and supplier vetting process, 2) Platform selection: Shopify vs WooCommerce vs BigCommerce with recommendation, 3) Brand identity essentials for launch: name, logo, color palette, and tone of voice, 4) Store architecture: pages to build and conversion optimization for each, 5) Product photography brief for high-converting images, 6) Pre-launch audience building: 30-day email list and social following strategy, 7) Launch day promotion sequence: email, social, and paid ads, 8) First 90 days marketing plan: channels, budget, and targets, 9) Inventory management setup, 10) Customer service workflow for the most common post-purchase issues, 11) Unit economics model: cost, price, margin, and CAC target.