Anyway, I would not get so down about the lack of a member. Do what you guys can and gather support from people like me who are willing to lend a skill you may need.. gather a task force of sorts, or you may never get started. When you make a mod, a lot of it falls on your own shoulders I'm afraid, but if you bear it's weight well, you well soon find others may push some plans back to help you. It's happened before.
They aren't going to do it till you have something to work with though.. something to show others your commitment. A vast majority of mods fail because of some factor or another, and all modders here have been burned by a project like that. It's hard to put forth so much work and then never see results for it, especially when you are already busy and didn't have time to waste. You have to put forth something in good faith so other modders can gauge if it's worth pushing their own plans aside for a bit, especially with a big mod like this.. a lot of people can talk about a good idea, but you're going to have to show that your more than talk to get some of the big guns in on it.
Right now, you have a few people offering help, and it's true you'll need more than what you have right now before you can start, but you are asking a lot up front. So I wouldn't worry so much about the lack of members because as it stands, a member like what you say you need would be in rare supply and hard pressed to jump on board.