Hi Bdub, I'm still trying to understand what your W is unhappy about in your marriage. Besides her OM, what is she unhappy about in your relationship that is causing her to seek an immediate divorce and moving out in October?
Did she serve you with divorce papers? It seems like you are working with her in moving forward with the divorce. Why not just let her do ALL of the work on the divorce? Delay it for as you can, instead of putting out an artificial (finances is not a good enough reason) 3 to 6 month period.
Keep your focus on your sons and helping them as best you can.