A mid-sized technology company is considering two strategies to incorporate advanced natural language generation into its flagship product. Strategy A involves paying a licensing fee to use a pre-existing, state-of-the-art model from a large industry leader. Strategy B involves building a new, comparable model from scratch in-house. Evaluate the financial feasibility of Strategy B for this company. In your evaluation, identify and explain the most significant cost-related challenge the company would encounter during the model's creation.