There is no doubt that having money makes it easier to access mental health services especially when our NHS is in such mess
However, you need to be able to identify there is a problem, you need to have some understanding of what is happening to you and have the inner resources to reach out for help and money can't buy you any of that
My DH was in the armed forces years ago, not Afghanistan but NI, they had to carry guns everywhere and always been on their guard, when he left he took up every dangerous sport there was , basically he had become an adrenaline junkie. It was only because of my training ( social worker) that I was able to see that something wasn't right and persuaded him to see someone