What is the best way to give access to only the RBS Setup task?

We are using a centralized RBS for budgeting purposes. The maintenance of resources under this RBS (like adding new resources and deleting old resources) will be done by a team who currently don't have access to Functional Setup Manager. The complete access to FSM cannot be given to them due to security reasons. But, we are looking for ways to give them access to only the setup task "Manage Planning and Billing Resource Breakdown Structures".

We have explored options to add resources to RBS using FBDI. But, the current challenge is that the FBDI doesn't support deleting existing resources. So, please suggest the best way to give the access to the setup task "Manage Planning and Billing Resource Breakdown Structures".