I know someone who went to Italy for IVF. At 51 she had triplets. She was single, had a high flying career and while there had been a long relationship with a constant man, in the end, he didn't want children.
The boys are now in their late teens.
The boys were definitely well loved and very wanted, but of course she found things very tiring at times. What she did have on her time was money for help. When the boys were babies, she had a night nurse, just so that she could make it through the days.
Should the worst happen and her health deteriorate suddenly, she has the means to pay for care and help. The boys have each other and they're not babies now, although obviously still need their mum.
I'm not close enough to her to know how the boys feel about it all, now that they're old enough to have an opinion though.
My personal opinion would be that it's too old. But I had my babies between the age of 25-31. Only you can know whether you could really do this.