Hugs to your sister!
Tough times I must say!
Dear such procedures are often expensive all because they tend to use latest technologies and expertise that cost big.
But yes there are certain places I have read on forums that most of the people seem to suggest.
They are offering this procedure in lower cost and valuable packages.
And you can have full-scale treatment in such countries and they might have no allegations.
I would suggest you go for internet search you might find appropriate travel place for you.