Accounting transactions for units are tied to different fields in the unit profile. This article reviews those specific fields.
The Purchase Date of the unit will be the date of the purchase in accounting.
On the unit's financial tab, make sure the Purchase Price and Floorplan Balance are equal.
Use the Additional Cost field to create a payable to a separate supplier, like a freight company.
Add the Floor Acct. This should be a floorplan liability account (NF or UF).