Hi op
So sorry you've had quite a shock
Just by giving on the little bit you have posted, is there anything for him to do where you are?
If your rural and a farm sounds quite physical is there nothing he could be doing up there.
Getting out of his head and chasing sheep around, building or packing stuff would be helpful
For him.
Also in my experience kids teens young adults will open up in a car, mainly because they are not facing you when talking, not seeing your expression and safe in the knowledge you have to concentrate on driving seems to work magic.
Is it snowing where you are have you got a big shovel etc, if you could make him feel useful it could offset some of his guilt around uni and expenses. 
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