Automated Document Generator

Hello, I have a product concept for a B2B SaaS tool that automates document generation for companies that work off quotations, think elevator maintenance firms, contractors, fit-out companies, etc. The full concept document is attached, please read it before applying. Start your proposal with the word ROBOT (first word, first line), this is how I confirm you actually read this post and didn't just submit a generic AI-generated proposal. Applications without it will not be considered. What I need from you at this stage is not code, it's a technical proposal. Specifically: 1- Recommended tech stack for the core engine 2- System architecture 3- A phased roadmap 4- Cost and timeline estimate for each phase. 5-Your honest take on the hardest technical part. Who I'm looking for: * Freelancers or agencies with real experience in: * Document processing / OCR / LLM-based data extraction * Template engines or dynamic document generation (PDF/DOCX) * Multi-tenant SaaS architecture * Ideally, prior work on a similar "extract once, generate many documents" or workflow-automation product Please share relevant past projects or case studies in your proposal, generic pitches without evidence of similar work will be skipped. Next steps This will be a serious engagement between my startup and you as a freelancer or agency. We're looking for a serious partner to work on projects like this, not a one-off gig. Please don't submit AI-generated, generic proposals with no real substance; they will be skipped without a reply. Thank you, Zain