Multiple organisations with their own users in One Opigno instance

Hello, We are having a requests from a customer who makes trainings for multiple organisations. Each organisation has it own set of users. In the beginning they want us to build custom functionality, but in the long run they probably want to use more of the Opigno functionality for their customers. Our first thought to tackle the Multiple Organisations for one Opigno is to introduce a new group "Organisation" in organic groups so we can mange the content per organisation and still have access total functionality of Opigno. We probably need to add a role or more roles so we can make sure that end clients don't have access to content of other clients but that is manageable. My questions is: Is this the right approach ? or do we overlook something which will cause major issues ? Thanks in advance