Sounds pretty awesome. By novella, I'm thinking 15,000 words? And I am a writer, I love writing fictional stories. I have an unreleased book (being edited and cover being drawn) about a girl with the power to manipulate energy, in a world where energy is the currency. Can't disclose too much information about it, but basically, I'd love to write your story.
However, as you can see, it'll take around 30 days to write such a long story, especially if around 20,000 words, although $225 is a pretty decent amount. I write 500 words per day comfortably, but I can do the research on the topic and get it done in good time, and self-edit. I also do some editing. Anyway, thanks in advance!