So you want the guitar to a point where you can finish it, assemble it, do a set up and then play it?
Do you want all the fretwork done? Do you want it sanded to the point where you could shoot a finish on it?
Really, the only work you say you'll actually do is sanding the back of the neck a bit.
Let's be honest, what you're actually asking for is a complete custom guitar, just 'maybe without a finish' (and even that you kind of ask for anyway), and shipped to you without the bridge/pickups etc (which any decent builder would want in front of them anyway to make sure it all worked).
But your price isn't what I think will stop you getting offers from anyone good enough. It's the time demands doing something like this puts on a hobbyest builder. Would you be happy if building this guitar took a year? Would you be happy if the answer you got to 'when are you going to do some more work on it' is 'I'm not sure, work's a bit hectic this month'? Pro builders are good, they do cost more, but that guarantees you their time, and a schedule for them to work to. Hobby builders aren't at that stage imo.
I'd strongly urge you to reconsider both what you're demanding and who you're demanding it from, but hey, I can't force you to.