How Intercompany Transfers (transfer orders) project expenditure/cost can be costed to projects?

Dear community,

Our client has following requirement:

Ledger: NLed1 Legal entity: LE1 Business units: BU1

Ledger: NLed1 Legal entity: LE2 Business Units: BU2

They need goods to be transfer across organizations (different Profit center BUs) from BU1 to BU2 and also project expenditure/tasks cost should automatically be charged to BU2. since for BU1 the project cost is taking place already. until recently any project costs incurred for BU2, they are manually adjusting them since BU2 doesn't have inventory so far. They have recently segregated and have an inventory in BU2.

Can somebody please share detailed information on how above requirement can be achieved? We are thinking to implement SCFO as we are also looking at having intercompany invoices.