You have at least part of an outline of what you want in the mod, but...
Any actual milestones?
Any timeframe for when things should be completed?
A rough idea of all the content you'll need?
What needs custom code/script?

If not, I'd suggest getting those things sorted out. Having organizational shit handled will help things get done in a timely manner. Actually, they'll help you get things done period.

Additionally, I'd suggest maybe taking a few days off of this project and just start playing around with your workflow. Get the hang of baking out normals and texturing in photoshop so you don't have to rely on an outside party to get textures and things that look decent.