Ha. I like your heart, Dinah.
Perhaps he/she/they are Chrismatic? I did not read that, from the first post. And perhaps - - all is well, behind the scenes(?) - - and this is simple burn-out(?), as you suggest. Need another word for burnout. Burn-down, perhaps? Would need More Data, as #5 would shout. Is there outside family support?
My view is that giving up on a particular WORK, is not - wrong at all. In this, it could be said that HE is simply cutting HIS losses. We have all done that. Changed Churches, etc.
Let me get the Definition of Agnostic. (freedictionary.com)
a. One who believes that it is impossible to know whether there is a God.
b. One who is skeptical about the existence of God but does not profess true atheism.
ha. Is he A., or B.? In either case, he seems (from his own mouth) seems pretty far gone.
I would have to say - - that if this was a planting mission - and if I was someone who was donating for this planting mission - Sorry about this, but - I would stop sending money. But if he was at all honest - he would have notified me, and would have started sending the checks back. An agnostic has no business trying to support his family by preaching - or trying to start a Church.
The fact is - he, is OUT of there.
To me - - yes, I realize that his wife - may be getting jerked around a bit. But this is, to me, no reason to Divorce.
The KINDEST view I could come up with, was - - One might see this as a Sickness of his spirit - and not a breaking of covenant or rebellion against God. If we look at it that way - - he STILL needs to quit being a preacher, obviously. And if it was his wife, instead, who had gotten physically sick - and she needed to move to Mayo to get cared for - - would this be a call for him to divorce her, so he could continue his preaching work? No. Absolutely not. That is a ridiculous suggestion, in my opinion. So him being sick in spirit - is NO reason to Divorce him. But yes - - - they obviously need to find other work - at least for now.
Lots of stress out there. Marriage, Financial, Ecomonic, Socio-Political, Peer pressure, etc., etc., etc. Is very tough on the young.
Yes, prayer for them as they start their new life, is necessary.
PS. I think you and I have a slightly different view about Divorce, but that would be a different thread.