A software product named Magnolia specializes in transforming tank geometry, vendor quotes, and engineering data into comprehensive, itemized bids for field-erected steel storage tanks as per API 650 standards. Operating as a standalone web application, it facilitates pricing for new constructions, repairs, and demolition-rebuild projects without relying on external services, cloud hosting, or a database. The product, in its commercial version 1.0.0, is offered for intellectual property acquisition, pre-revenue, inclusive of its full source code, testing suite, and documentation. Magnolia is constructed using Python 3.10+, with Flask and Jinja2 templating, supporting 1,000 automated tests and comprehensive documentation covering architecture and installation. It boasts an owner-developed IP that excludes third-party workbooks, customer data, or proprietary spreadsheets. The software integrates a singular engine with three operational modes: Budget, Competitive, and Sapien. The Budget mode generates prices based on tank geometry using established productivity models. Competitive mode allows for the inclusion of vendor quotes and a full financial stack, while the Sapien mode relies directly on engineering details and weld reports. Magnolia's standout features include deterministic outputs for consistency, auditable results by design, and a self-checking mechanism ensuring estimate completeness. It addresses the market of field-erected tank bids which often run into millions and are traditionally managed on vulnerable spreadsheets. Designed for engineering firms, industrial contractors, or software operators entering this high-value niche, a confidential buyer package with various executive summaries and demos is available for interested parties.