Disclaimer: I only have a passing familiarity with Blender, so I might be wrong on some counts. I think you'd want to run the blender GUI locally and only call

Disclaimer: I only have a passing familiarity with Blender, so I might be wrong on some counts. I think you'd want to run the blender GUI locally and only call out to a headless rendering server ("render farm") that uses your service under the hood to get the actual render. This separation is already something blender supports, and you could for instance use Blender on Windows despite your render farm using Linux servers. Cloud rendering is adjacent to what you're offering, and it should be trivial for you to expand into that space by just figuring out the setup and preparing a guide for users wishing to do that with your service.