Oh, Keith... I have no crystal ball.
All I can observe is what you write, brother and to share here openly...well....here goes.
First, you keep saying you're waiting on HIS input, but in the same breath, you say you made up your mind(sorta).
Need of another human is a frightful powerful draw... we all want and need to be needed.
God wants us perhaps to NEED HIM that way...not one another? Does He not say we shall leave our father, mother, brother and sister and follow HIM?
What Ande and Kaci or you and your wife want is inconsequential.
If this child's needs are so great, that you cannot keep your heads above water with the medical challenges and costs...then what?
On the other hand, if not YOU, then who?
See? I have NO answers.
I echo 4 Dogs prayers for discernment, insight and a quieting of your will to hear His still small voice.
Keep the Son in your eyes!