That amount is art is too much for volunteer based and supposedly short project. Maybe consider cutting some of them, or reuse them when possible; like 5 sprites, 5 background and 5 CGs. I am a solo developer (meaning I did all the story, art, programming) before starting to offer my service professionally, and I feel even for passion project (less than 100.000 words), doing that much amount of art will take significant effort.
Yeah, I wrote that post late at night, but now I think you’re right — it really is too much work. I’ll see what I can adjust. Honestly, I was expecting something more sketch-like rather than fully polished artwork — just enough to visually get a sense of how things might look. But even at that level, it still seems like a lot.