Hi Greenfir!
Well it depends on where in UAE.. If Dubai, then you simply can not compare Uralsk with Dubai..
Kazakhstan would be such a great lifetime experience, and I mean it.
But with kids, I am afraid, it will be a bit difficult at the beginning, simply because in all the mentioned Kazakhstani cities people mostly... barely speak English, so in terms of communication it will be an issue. But if you know some Russian, then why not to try to live in here.
Best,
N.