Seeking Affordable Tabletop Exercises for IT Team

The author of the post is looking for a good TTX (Tabletop Exercise) for their 10-person IT team. Until now, they have considered TTX as a mere formality, but the author now wishes to purchase a service for it. The available options seem too expensive, with the cheapest being around $15k, and they plan to use it only once or twice a year. The author is asking for recommendations.