Cost + timeline + your credentials?

Realistic ranges for an independent music retailer at $500k, $10M GMV:

• Audit: $499 / ~20h @ $25/hr. 5-business-day turnaround. Written report covering catalog brand mix, financing partner gap, used market plan, schools B2B share, brand authorized-dealer portal priority.
• Build: $4,999 / ~200h @ $25/hr. 6-week fixed-fee scope: catalog + Affirm/Klarna checkout + used market with condition grading + 1 brand authorized-dealer portal + service / lessons add-on + Klaviyo + schools tax-exempt workflow + Hyvä storefront.
• Custom enterprise: quoted in 24h, multi-week engagement. Multi-brand portal (Fender + Gibson + Martin + Taylor), full consignment + auction layer, lessons LMS integration (TrueFire / Fender Play / Pianote), B2B Net-30 checkout, multi-region voltage variants, CITES compliance.
• Hosting: $400, $1,500/mo on Cloudways / dedicated. Music retail traffic is bursty around NAMM week + Black Friday / holiday + back-to-school for instruments, over-provision for 4-6x base.
• Ongoing: $1.5k, $5k/mo retainer for through-cycle ops (brand portal renewals, used market reconciliation, financing pre-qual rate optimization, lesson / service attach-rate iteration).

Credentials: I’m an Adobe Certified Magento + Hyvä developer with musical-instrument retail builds shipped across the US, EU, UK, and India. The pattern above is the same one I use across shipped musical-retail stores, same hourly rate, same scope template, same playbook. Reviews on Upwork (linked in the testimonials section above) cover the actual delivery quality.