You may want to consider using AI voices for these massive projects. You already have significant issues affording lengthy voice acting for large scripts and you can always get regular human voice acting for the smaller projects later on.
When major companies refuse to hire or otherwise fire existing workers to replace them with AI for profit, then people get angry. However, I don't feel anyone would reasonably be upset with you if you went this route. I can direct you to some (free) sources as well if you want to experiment with it.
I'm aware of AI voice stuff since I wanted to have a 'narration' for audio-only videos on a potential content creation channel on Odysee. Maybe a donated still image or two from artists on my server ;)