For now Bakery does not benefit from multi gpu. So there is no faster bake for now. 1 GPU is enough till solved. What instance type you used exactly? All instance types i tried (Linux and Windows ones with Blender Cycles Multi/Single GPU rendering and bake) an initial manual installation of the NVidia driver was needed. You also should try SpotInstances when success with your M60. They are really cheap. up to 90% less. Depending on GPU for 1GPU around 0.20usd/h or 8GPU around 1.50usd/h. It s not a safe as on demand because you could get a notification 2min before they need them. But you can freeze the instance before and resume.