PDF Price List Data Extraction Pipeline (AI/Python) — 30 Brands

I have 30 brand PDF price lists (200–300 pages each, mixed layouts with images, specs, and price tables). I need a Python + GPT-4o vision pipeline that extracts SKU, model name, dimensions, weight, power specs, and list price into a standard Excel sheet. Can you share a similar past project? What's your estimate for a proof-of-concept on one brand (10 pages)?