@Shaz51 am so sorry to hear this. From my own experience (I had a 3 year nervous breakdown) what's needed is peace and rest. No stress. No work. No pressure to make decisions. I know this might be hard or sound impossible for your Mr Shaz.
Also what's needed if he does actually have a mental breakdown is a psychiatrist who can prescribe suitable meds for severe depression, and also talk therapy if possible. The stronger meds are what finally made a difference to me. But hopefully Mr Shaz can avoid a full breakdown.
Thinking of you both 💚
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