Do you and the girls have a support group in your local area? Join a church or SOMETHING. You are isolated and you need friends to surround you. I think it's high time that you also research churches and organizations that will provide you and D's some outlet to channel the inner tension in being displaced by W's actions.
It is even more important now that you begin doing this as I am pretty sure that the chit will hit the fan after FIL passes away. You and the girls need to be surrounded by loving and supportive people.
As for your job, you know best. I just think that you've been on the treadmill for too long without any relief. Do you foresee being in this field until you hit old age. It seems very exhausting having to chase down every lead and closing those deals.