Which buyer type is heavily invested in maintaining client relationships and negotiating for cost savings?

The buyer type known for being heavily invested in maintaining client relationships and negotiating for cost savings is the Meeting Planner. Meeting planners are professionals responsible for organizing and coordinating events, conferences, and meetings. Their role involves constant interaction with clients, stakeholders, and vendors, which requires them to build and sustain strong relationships to ensure successful event execution.

In negotiating for cost savings, meeting planners actively seek the best deals for venues, services, and supplies while managing budgets effectively. They are adept at leveraging their relationships and experience to secure favorable terms that align with their clients' goals. This combination of relationship management and negotiation is crucial in their role, ultimately contributing to the success of the events they plan and the satisfaction of their clients.

The other options, while related to the broader context of buying and organizing, do not emphasize the same level of focus on both client relationships and cost-saving negotiations as meeting planners do.