QB Issue Resolution:

I recommend setting up the item for Barrels and the item for Board Feet and not using a Conversion Set methodology.

Then, you Buy barrels. Once they are on hand, you can convert them using Inventory Adjustment with Qty and view Value, so that Barrels goes down by 2 and Board Feet goes up by 30,000. Confirm for Value that the net difference is 0.

Resolution for Issue 'How can I get my related units under the 10,000 max QB allows? I am purchasing one barrel, which equals 15,000 board feet.' available: Yes (Solved).
Source: Intuit Community forum.

How can I get my related units under the 10,000 max QB allows? I am purchasing one barrel, which equals 15,000 board feet.: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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