Hi there, ProfessorRod.
I appreciate you following up on this thread and providing me with details about your business setup.
The release of QuickBooks Online Advanced won't affect your current subscription price. You'll also not be forced to upgrade to this new version of the program. As the business manager, you'll be able to use all of the budget line items as normal. You can make any necessary entries and modifications in this area without change. The difference with Advanced is that you wouldn't be able to add any more entities to the chart after the effective date in April without upgrading.
The link in my post above will explain the new usage limits. I can also relay your thoughts to the Product Development Team.
I'll be here if you have any other questions.