If you’re already using V-Ray with another DCC such as 3ds Max, Maya, or Cinema 4D and are transitioning to Blender, you’re all set. V-Ray for Blender is included at no additional cost in all V-Ray plans, including Solo, Premium, the ArchViz/M&E Collections, and V-Ray Education.
This means you can make the switch to Blender and continue using V-Ray without worrying about licenses. You'll also maintain access to the other Chaos products included in your plan.