The department may create and coordinate a unified system for the provision of guardianship services to vulnerable adults who are ineligible for developmental disabilities program management services. The system must include a base unit funding level at the same level as developmental disability corporate guardianship rates, provider standards, staff competency requirements, and guidelines and training for guardians. The department shall adopt rules for guardianship services to vulnerable adults which are consistent with chapters 30.1-26, 30.1-28, and 30.1-29.