Your wife is so very fortunate.
My husband and I know a young lady with MS (found out not too many months ago) and how frightening that has been for her and her loved ones. She is dealing ok with it now - but it is only when you walk in those shoes that you can truly understand all that you said is true.
I'm so glad to know FR has helped you with the prayer "thing" - it has done the same for me.
The best thing to know is that God is with us and with our loved ones every step of the way through it all. The hairs of our head are numbered. This earth is not our final home, nor this body our final "tent" - Praise His Name Forever!
And, the praying people here on Free Republic are fantastic prayer warriors. Just make a prayer need known and they will come to pray! What a privilege to be here - and what a joy!