Using metadata tagging functionality, resources related to specific ventures can be labeled, which allows for a detailed breakdown and assignment of costs when assessing financial reports and statements. This segregation facilitates granular tracking, aiding in accurate cost attribution to each venture, which is essential for refined budgeting and resource optimization analysis.

Creating separate organizational units or new accounts is not required in this scenario and might be less efficient considering all projects are in a single account already. While setting budgets alone is helpful in managing costs, it doesn't provide a solution for tracking costs at the project level, which is necessary for the presented scenario. Generating detailed service usage reports without tagging would not efficiently filter and allocate the costs to individual ventures.