I want to turn our current brochure-style site into a self-serve design portal so customers can plan their flat-pack kitchen, see it in 3D, and walk away with an instant price. Here is the flow I have in mind: the visitor chooses either a starter template or an open canvas, drags cabinets, appliances, and finishes into place, and watches a live 3D render update alongside a running cost tally. When they are happy, they enter their contact details, room measurements, and any special project notes. The system then generates a PDF quote, the full design file, and a production bill of materials that is automatically emailed to our factory in China for manufacture. Key requirements I need covered • Mixed design modes – both pre-set templates and fully custom layouts • Real-time cost estimation tied to our SKU pricing table • Web-based 3D visualisation that works smoothly on desktop browsers • Form capture for contact information, room measurements, and project requirements • Automatic output: customer-facing quote + internal production package pushed to the factory mailbox/API • Clean, brand-matching UI that slots into our existing website Acceptance criteria 1. A live demo hosted on a staging URL that lets me complete a design from start to finish. 2. Accurate price calculations within ±1% of our reference spreadsheet. 3. Generated PDF quote and factory files arrive in the correct email inbox with all line items listed. 4. Source code and deployment instructions handed over so we can run it in-house. If a proven off-the-shelf engine speeds things up, I am open to that; otherwise a custom build is fine so long as the above workflow is met.