On their current course, 2 years best case scenario. UAE recently tried to prop them up with $3 billion, and it did have short term positive effects. But they are losing 1 billion per month of their currency reserves (24 billion): and that was before this report on their antiquities being raided.
With less than 5% arable land.....they won't make it. The tourism industry was always keeping them afloat. Their economy isn't designed to withstand this. They basically have nothing to offer but sand.