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I say that only as a compliment to your vision and ambition in this project. With the groundwork (and more?) that you've laid, you can probably even get a sizable amount of volunteer work both in graphic and audio asset contributions, if not more technical aspects.
The MMORPG community has seen other great projects like this flounder about for years because not only can one person typically not get such a massive undertaking done, but teams of as many as 10 never bring their product to fruition.
I wish I could be of some help, but I'm an idea person, and you have plenty already. Good luck to you.