Okh, nice attempt!
If you want the price to appear in the Price column, you must set a default currency at the end of the file com/eteks/sweethome3d/io/DefaultUserPreferences.properties found in the SweetHome3D.jar ZIP file (installed in lib subfolder of Sweet Home 3D installation folder). This change will let you view the columns in relation with prices (price, VAT %, VAT, price VAT included).
Pay attention that the values you can use in <furnitureVisibleProperty name='...'> are the values available in HomePieceOfFurniture.SortableProperty which are different from the ones in DefaultFurnitureCatalog.PropertyKey.
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Emmanuel Puybaret, Sweet Home 3D creator
