Migrating from BigCommerce to Magento, realistic timeline and cost?

Estimate after examining the catalog, variants, company pricing, integrations and historical data you need to preserve. Rehearse exports and imports, customer account access, payment connections and a complete order. Inventory useful URLs and test relevant permanent redirects before cutover. Include reconciliation of orders arriving during the move and a recovery plan. The product count alone does not establish a standard budget or schedule; the difficult mappings and storefront work usually need direct investigation.

Official references: BigCommerce storefront architecture; Adobe Commerce and Magento APIs.