Right Cad can only at this time be added to a permanent license and not to a SaaS subscription license.
Right-Cad can be added to an existing RSU permanent license or purchased along with a new permanent RSU license.
Minimum needed to accompany a new Right-Cad purchase is a load module: Right-J (ACCA), Right -F280 (HRAI), Right-Comm Load (ASHRAE), or Right-N (ACCA).