"However, the chances of any aviation training organisation or business employing a person over 60, is very small indeed."
Most of what you say one-track is good advice, but I have to disagree with the above. I am closer to 70 than 60 now and find training work very much available - notwithstanding CASA's efforts to make it unattractive.
Of course it helps to have done checking and training in a former life. My advice to pilots who showed aptitude (and had the experience to be credible) was always to take on training, then checking, to cement their future. Pilots who have taken the soft option of merely flying the line all their career are less likely to be able to remain in aviation in their dotage.