I hope that no one finds this offensive or judgmental, but having a goal of achieving an extra wife is not the way to go about this. Make your goal to become the strongest, most YHWH-following, emotionally healthy family that you can possibly be. Then, maybe, YHWH will use you to minister to one of His daughters. Everything must be about what He wants, His plans for everyone's lives. I believe that tough times are a-coming and we must become the best that we can be.