Complex, the more I follow your sitch and learn about these interactions, the more I'm convinced that your challenge is more of a "career path" one than a "marriage/infidelity' one.
I think if your wife were more convinced of your likelihood for success and stability, she'd be back with you by now. HOWEVER, you need to decide if you want to be married to someone who -- when she doesn't feel secure financially -- not only cuts and runs, but runs to another MAN.