Thank you so much for getting back to us. So relieved it wasn't a scam.
I think that different families have different ways of approaching things. In some going to an adult's parents would seem odd, in some it would be a tactful thing to do, and you know your own family best.
I have to say that I am not getting a good picture of her marriage! A husband who has decided to do a course, gets her to do the donkey work, including 'begging'.
However, you have been a kind aunt, and if it goes well, and helps them enjoy the rest of their lives, then they will have cause to be grateful to you.
Doing training when one is older can be difficult. I became aware of a young (not very close) relative who would like to train as nurse. No financial help as she already has a (rather useless) degree. As the nurses of my era know, we had to work long hours on the wards, and study on top of that, but we had enough to get by on without asking anyone else for funding. In gratitude for my own training, I offered some support. However, she is sensibly doing a caring job that may lead to sponsorship, so I am waiting in the wings.