Python Sourcing Pipeline & B2B Lead Enrichment (Phase 1)

I saw your background in Python data pipelines and scraping, and wanted to reach out regarding Phase 1 of a custom lead-sourcing engine we are building. Who We Are: We are Graff-Pinkert (https://graffpinkert.com/), a high-end used machine tool dealer specializing in precision European machinery (e.g., Willemin, Escomatic, Tornos, INDEX, Salvagnini). Instead of relying on machinery brokers, cold-calling, or buying generic contact lists, we are building an internal OSINT data pipeline to track down end-user machine owners and plant managers directly. Phase 1 Build Requirements: Data Ingestion & Cleaning: Parse, clean, and standardize messy incoming raw datasets (Customs Bills of Lading, UCC-1 equipment financing exports, and scraped HTML equipment lists from shop websites). Automated Suppression Check: Check parsed domains and emails against our historical email interactions via Google Workspace/Gmail API. Any past contacts must be flagged as EXCLUDED to prevent re-approaching existing relationships. B2B API Contact Enrichment: Pass clean target companies through B2B contact APIs (Apollo.io / Hunter.io) to retrieve verified names, titles, and direct emails for Plant Managers, Shop Owners, and Toolroom Supervisors. Structured Output: Export normalized, clean records directly into a Master Google Sheet / database schema ready for direct email and physical mailer campaigns. Questions for You Before We Begin: Verification: Can you confirm you are an individual developer who will write, test, and deploy this code yourself? (We only work directly with independent engineers who write their own code—no agencies or sub-contractors). Architecture & Optimization: How would you approach structuring the deduplication logic, proxy handling, and API caching to keep ongoing execution costs near zero when parsing multiple raw data streams? Estimate & Timeline: What is your estimated fixed price (or total hours) to build, test, and deliver Phase 1, and how quickly could you turn around a working prototype? Looking forward to your thoughts and how you would structure the Phase 1 script. Best, Noah