UN NYC Economic Affairs Intern

I interviewed for an unpaid internship. They emailed back saying they are looking at me positively and will revert. Been 10 days since that and if chosen, I would need to get G-4 visa also.

Ive already done one UN internship along with my Masters degree, so Im not even sure if should be doing this unpaid one which will involve considerable expense (it will wipe out my savings, but my parents are supportive). I have got no job offers after applying extensively hence applied to these internships.