I'm already in this process...... got an I-130 approval in 2013 so we've recently filed the I-601A. It is so important to have a good lawyer that knows what they're doing with these waiver request. Hopefully we'll get an approval soon and the rest of the process will go smoothly. Last resort is to wait out my wife becoming a USC which will be sometime towards the end of 2018. Been a long road but staying hopefully.