As Sam said, this is a case of you 'following your dick and imagination halfway across the country'. Harsh, but true.
What you're not acknowledging is that living with someone is entirely different than talking to someone online, when it suits you, and on your own terms. You're going to be around each other 24/7, and should you not get on with her, or have a lovers' tiff, all these problems are going to be amplified by the fact you're occupying the same space.
There’s no other motivation for you moving; you’re pinning ALL your hopes on her. So if things don’t work out as you expected with her, you’re potentially 1500 miles away from anyone you know, so you'll have no infrastructure of support, and will be left with an unsatisfactory job and a lot of misery. Personally I think this could be very emasculating for you.
It might be different if you'd met her a couple of times, but this is a commitment you're making prematurely, and without consideration for the practicalities. You should also ask yourself - if the tables were turned, would she do this for you?