bizzyb I'm afraid you have lost your money.
Mark is clinging on but eventually he'll give up.
Most likely he'll disappear into a depressive funk for a few months like the end of last year.
It's a shame but that's how he is. He continues to make the same mistakes over and over.
More worryingly he has been having thoughts about ending it all yet doesn't seem to be seeking professional help for it:
http://marklyford.com/personal/maybe-the-world-would-be-better-off-without-meHe is receiving professional help, as well as support from friends and family.
Speaking from experience, suicidal thoughts are very common when receiving medication for other mental health issues.
Have you never thought about doing something "bad"? I know you have, but did you act on it?
Mental health doesn't have to incapacitate someone and neither does it have to negate their inherent intelligence and ability, and only rarely does it do that. Half of the people you know either have, had, or will have mental health issues, and will still be "normal".
Mark is not "clinging on", he is fighting, and he should be given a break to make things right, which is a massive part of his determination to continue.