Dear, ask your sister dont worry at all. As there is always a way out from your problems. Life is the name of challenges. Just face the challenges with such a strong power that everyone appreciates you.
Those who keep strong will get something good in future. And those who lose heart remain empty handed.
Dear there are many clinics in which prices are affordable. There are many couples who want baby through surrogacy. But cant afford the expenses. I will suggest you search in google about clinic in Ukraine. I have heard that there is a good clinic which provides services at nominal rate. So you must gather information about it.
I myself is considering for surrogacy. But still has not finalized any clinic yet. May God help your sister.