I think hiring project manager would help more than hiring another artist or animator.I also don't think money has anything to do with it, however, I disagree that it's because he needs another artist. I think he just needs a person to better organize the whole project. The team doing DMD and Melody is doing 2 games at once with a fixed schedule, and the product is still very high quality stuff. That's what great organization can do for a project. That's why no matter what you look at, whether it's in business or event in hospitals there's always a position of team manager to help guide everyone in the right direction.
But it's a prideful thing, at the moment DarkCookie is managing the project and in my opinion his nature isn't too good for managing things, people who watch his streams can agree with me? Sadly he'd never hire project manager, like a real one with few years of experience.
Two reasons:
1)he is currently self-employed, and he cannot "hire" someone real unless he registers his company(certainly project manager cannot be commissioned unless he is fooling around haha ; p)
2)I can't bring myself to imagine patreon developer hiring project manager to help him organize things, it's just too vain.