Hi Derxa.
About 4 years ago now I came in from work one night to find my DS (then 26) sitting on the sofa sobbing. Turns out that while we were away the previous weekend he had sat in his room and lined up pills to take, but the cat had come in and interrupted him! He had just broken up with his gf and moved back home, and unknown to me he hadn't been going to work for weeks and had cut himself off from all his friends.
I felt so helpless 
and just hugged him (we are not usually a tactile family), listened to him, cooked him dinner and we rang the GP together. He got an immediate referral to the local MH crisis team who met with him the next day. The GP signed him off sick from work and prescribed ADs and CBT, but while waiting for the CBT he also went to some group therapy sessions which seemed to really help.
It took months til he was ready to return to work. He has finished his counselling now and is off the ADs but he's not the same person. He was never outgoing but he is very withdrawn these days and has few friends, rarely goes out unless it's work-related or a family social occasion.
I still worry about him. But he seems content to coast along as he is for now. He still doesn't open up much to me but seemed to find exercise (walking the dog, then jogging with him) helpful.
It must be so hard for you not being able to be there.
If your DS has admitted to his suicidal thoughts that is such a positive thing for him, it means he's reached the bottom and is ready to start climbing up again. It also means the start of a long journey for him (and you). I am heartened that your DS still has friends and appears to have been able to talk to them too - that's good.
I do think a pp's suggestion that he comes to the farm with you is a good one, especially once he's been on the ADs for a little while and they have started to work.