Without specifics, I don't know what to say except this is not at all realistic from a development standpoint. I'd go as far as to say the story is unfit for the medium if it truly requires all these characters.
30 unique characters are within the realm of reality, it's very doable. If you can, I'd do that.
So, I know this is quite the callback from days gone by, but I was wondering if there was *ANY* chance you still happened to have this file? I assume you (and everyone else who tested it out for me) deleted it, but hey, might as well ask.
the tl;dr here is, I either deleted the file, or completely lost it (How do you lose something on your PC? Fuck if I know), its gone from mega, and I'm trying to find it for... reasons.