you can't get great advice or opinions if there are details you are leaving out. Hopefully for you that those reasons will help your case.
But honestly, seeing your child 2 days every 2 weeks (the weekend that you have her and you are home from your job) if mom moves back and even gets every other weekend and one night a week means that mom will have her 3-4 days ever 2 weeks to your 2. And your wife will have her the majority of that time. In the end, who do you truly want to be raising your child -- someone else or you? Is the pay increase really worth that much time away and will your current wife get bitter about being a (pretty much) full time single parent to your child? Regardless of what the courts say?