Multiple workspaces for subsidiary company / brands

The current issue for user and admin
User:
When they need more workspaces (Like 5-10 workspaces), they won't get special discount
The more workspace that they sign up, the more invoice copy need to process (Accounting) instead of one invoice per renewal

Admin:
Admin cannot design any plan for multiple workspaces. Means user who wants to subscribe more workspaces they won't get special discount for the price
Manually add workspace to user with unlimited plan only. Not able to add them to the plan with the right resources.
Manage billing separately.

Would love to see mixpost to have such ability to allow user's to create multiple workspaces based on allocated number of workspaces by sign up plan or admin could adjust it from backend.