I am a Sketchup and Vray teacher. I have taught students for free and organised online classes but i have no idea on how the standard cost in dollars for tutoring a client privately and tutoring groups of people professionally in sketchup and vray.
I would appreciate every advise
I have no idea about dollars but in the Netherlands, my company charges 500€ per day for private training (we only offer private training).
There are cheaper ones out there but that might give you a ballpark. Just google for SketchUp training or vray training and see what other ppl are asking, that will help you too, probably.
Good luck setting up your business
Edit: also consider getting certified. That will get you some street cred since the vray certification tests are notoriously difficult. ps you can look me up I’m certified