iMotorhome Magazine reviews Horizon’s new model The Casuarina. Horizon Motorhomes is kicking off 2014 with a new model: the Casuarina. Based on a Fiat Ducato extra-long wheel base (ELWB) van and the layout of its popular, compact Melaleuca model, the Casuarina provides extra space and a larger engine, while retaining the Melaleuca’s spacious and flexible…