Shopify B2B Store Setup

I'm looking to set up a Shopify B2B store for selling physical goods. The store should include:

- Tiered Pricing: 4-5 pricing tiers based on customer type
- Shipping Rules: Ability to handle multiple boxes
- Invoicing: Creation of invoices to be sent to customers using the Spark Layer app

Ideal freelancers should have experience in:
- Shopify B2B setup
- Tiered pricing configurations
- Custom shipping rules
- Integrating invoicing systems, especially Spark Layer

Please provide examples of similar work done and ensure you have a solid understanding of B2B e-commerce.