hile you did ask for advice, this might not be where you thought it was going to go. Simply say the word and I will put the brakes on this line of discussion. Meanwhile:
Getting cosmetic surgery does not necessarily equate to becoming more attractive - and certainly not invisibly. I'll suggest that the majority of cosmetic surgery is done for two reasons:
1] to make the recipient feel better about themselves, and/or
2] to appear better in public (from a distance and under controlled circumstances and timelines), Contrast with whether you might or might not appear more attractive to a potential mate.
Cosmetic surgery itself is an advertisement about the priorities of the recipient.
So, 'cosmetic surgery' does not automatically equal 'better looking to potential mates'.
But even if it were to be granted that a man might look better for his age to a potential mate, it still does not suggest that wealthy, good looking older men will attract women of an age where they are looking to start a family.
In short, to women looking to start a family " he is trying to look 20 years younger than his age" may well be more of a downvote than an upvote.