Shopify Developer Needed: B2B E-Commerce Build with Zoho CRM Integration

I'm a marketing consultant managing a Shopify website build for a B2B client. The client is a specialty equipment distributor with an established customer base, existing Zoho CRM and Zoho Books infrastructure, and a mix of public and house-account customers. I have attached a full technical brief and draft sitemap. Please read before applying. WHAT WE'RE BUILDING • Shopify storefront on a premium theme (design provided, no design work needed from you) • E-commerce catalog for consumables and parts: 100-200 SKUs at launch, up to 1,000 at scale • Zoho CRM and Zoho Books integration: product sync, order sync, and pricing sync • Multi-tier B2B pricing: 5-6 price tiers for house accounts, MAP pricing for public visitors • Customer login portal with tier-based pricing at checkout • PO number checkout option for logged-in account holders • Drop-ship and warehouse fulfillment routing • Territory-based sales rep locator (state-level lookup minimum) THE MOST IMPORTANT QUESTION Before anything else, I need your honest assessment: can multi-tier B2B pricing with Zoho sync work on Shopify standard, or does this require Shopify Plus? This single answer shapes the entire project budget. I need a clear, experienced opinion, not a maybe. WHO I'M LOOKING FOR • Demonstrated Shopify B2B e-commerce experience (show me examples) • Hands-on Zoho CRM or Zoho Books integration experience, specifically with Shopify • Familiarity with B2B pricing structures and customer account portals • Strong communicator who flags problems early • Available to start within 6-10 weeks (design runs in parallel) WHAT THIS IS NOT • Not a design project. Approved designs will be handed to you. • Not a content project. Copy and product data will be provided. • Not a Zoho cleanup project. Client's Zoho data will be clean and structured before build starts. BUDGET AND ENGAGEMENT TYPE Hourly engagement. Estimated 80-160 hours depending on integration complexity. The Zoho integration scope is not fully certifiable until a developer has assessed it. Budget range: $6,000-$15,000+ USD total estimated. Rate and hours breakdown welcome in your proposal. HOW TO APPLY Read the attached brief in full before submitting a proposal. In your proposal, include: • Your answer to the Shopify standard vs. Plus question • Your preferred approach for the Zoho integration • A relevant example of a Shopify B2B project you've built with CRM integration • Your hourly rate and rough hour estimate for this scope Proposals that do not address these four points will not be reviewed.