This is something we've been searching for solutions to, and was part of our thinking in trying this out. We'll be releasing new locations as we finalize them - stay tuned.
I'd recommend Qatar. Qatari government would probably be willing to cover costs/admin and potentially deep discounts on QR flights. You might even be able to do it all airside at Doha Airport, otherwise they'd do hotel + meeting rooms.
I don't think the Optics of dealing with the Qatari govt. are good for YC.
They are probably better than a lot of their neighbors. It is a consideration though.