Anyone able to shed any light on how this was calculated and if its accurate at all? X
It looks like it might have been done by looking at the progression of your natal Sun, either by solar-arc or secondary method. Progressed Sun looks to cross the cusp of your 2nd house, the house of your income and possessions among other things, when you are 41. I've not looked at the progressed charts to see what else astrologer may have seen, but perhaps there might have been Saturn in the picture, representing loss.
Anyway, that is my best guess. So it may be accurate, but one would have to construct and study all the relevant charts to see if they agreed. It seems like a rather specific interpretation. But that, I mean, it seems it would have been more accurate to say you
may lose income, rather than you
will.
Anyway, hope this helps.