Model Chart of Accounts

We have several companies operating in  J D Edwards and are introducing some new companies that will have a range of Object Accounts (revenue and expenses) that are not used in the existing companies. Some of the Object Accounts used in the existing companies are also not relevant for the new companies. We are considering options available to manage this situation.  One of the options we are considering is creating multiple models as follows:

One P&L model for existing companies

One P&L model for new companies

One Balance Sheet model for all companies.

I am concerned that creating two P&L models may become a bit unwieldy and is a bit of an "overkill" as the structure of the chart of  accounts is the same, its only that some accounts are not relevant for certain companies.   As our primary