I don't think you should be swayed by other peoples opinions on this. A bigger age difference between people and them getting married, can, in lots of cases, work out well, It all depends on maybe the maturity of the younger person, and what they really feel about the older person, and their realistic thoughts about things in the future.
Having said this, My late ex Husband married a woman who was 20 years younger than he was.He was fifty at the time, and the woman was 29.
In my opinion, she snared him at the time, which was quite unbelievable at the time, as he was very much his own person, successful in business and quite wealthy.. It was some time, until he realised that she suffered with manic depression, and was a gold digger, Always wanting everything, wanting to spend money, and go on exotic holidays frequently, and all the rest.
They had a child, and this caused her to go into her manic episodes, as she seemed to not want to care for a baby. The baby was only 2lbs in weight at birth, and had to have special care for quite some time. My late ex used to have to travel to different countries at times for his job, and his wife totally resented this, now that she had a poorly baby at home.
My ex cared for their little son,much more than his wife did. She did not work and they had a beautiful home,with all the expensive things that she had chosen in it.. But then, one day,my ex had a serious stroke.. and his wife said she didn't want to look after him, and said she wanted a new house for herself, at it was too stressful, to look after her Husband. She got her new home, bit still demanding money all the time.
They separated. Myself and ex, had decided to stay friends all this time, but I could always see, that my ex was always stressed up, whenever I saw him, His wife was quiet relentless in her demands still and it had a bad affect on him all the time.
He had two more strokes over the years, the last one resulted in his death seven years ago.