I wish I could give you a straight answer—it depends how you’re setting up your scene and cameras, or how many subdivisions the objects use in the scene, etc.
Rather than making guesses, I’ll just present some solutions I use to get good-quality renders with a 5-year-old, integrated Intel laptop graphics card:
If I want a fast render:
1. Set up the max render time in settings to however long I’m willing to wait. (Ex. 1800 sec, or 1 hour)
2. Take that grainy, or incomplete image, and process it through Intel DragNDrop Denoiser.
If I want multiple uses from a single scene:
1. Use CameraMagic to save the characters in multiple poses to different cameras.
2. Use RenderQueue to render each camera, giving me a background without characters. Then I render each camera which different poses were saved to.
3. In Ren’py, layer these different renders to show the characters moving around (essentially creating sprites).
If I want best-quality but slow render:
1. Pose and create multiple scenes.
2. Render them all in row on my computer, overnight, as I sleep, using RenderQueue.
In short, think outside the box. There’s plenty of tools out there you can use to speed up production, if you’re clever enough.