Thank you for the advice, Susie.
I think that because this work is significantly more money than the writing work, that overrides most other factors. For the short term at least, I would rather just dive into the highest paying work and then deal with any consequences that arise from that. Especially considering I REALLY do need the money.
I was thinking that it was worth keeping more than one client. But then my main writing client paused the work, and the other client doesn't really give me enough work to keep them on as my only writing client. It seemed like the right moment to make the decision to focus just on the one thing.
From what I've heard, this project is likely to last until the end of the year. So I'm inclined to stick with it until then, then if it comes to an end I'll review my situation. I'm hoping that I could then get other work that's something to do with AI. Or this client might have other work for me anyway because I think they might have other work besides the chatbot testing.
The other thing worth keeping in mind is that I do still get a small amount of money from Medium. It's not much at all now, but at least it means that technically I do still have money coming in from more than one source.