Assignment of Users to Contract Resource Organization for Enterprise contract access

Hello,

We are using Enterprise contracts and want to access to users to specific BUs.

The Problem we are facing is that as Data access that we are assigning to Job roles and users is getting overridden by the Resource Organization used for Contract Organizations, we can't have only 1 Resource organization with all BUs linked to it.

As we are dealing with multiple BUs, one option that we are evaluating is to create a separate resource organization for each BU. But in that case, maintenance and migration would be difficult. Request you to please suggest if there are any other options we can consider.