I live in Dubai and I love it. 15k won't go that far unless you have accommodation provided, flights and school places paid for. If those things are covered you would manage just fine.
Accommodation is the most expensive outlay. It's roughly 200k for a 3 bed villa.
Petrol is cheap.
Cars are cheaper than the UK, insurance about the same, tolls on motorways but no road tax.
TV, broadband and phones are very expensive.
Groceries roughly London prices. Imported stuff costs a fortune but local stuff is cheap.
Water and electric cost roughly the same a year as you would pay in the UK for electric, gas, water and council tax combined.
Schools around 40-60k a year. Uniform very expensive. Think £30 for a top!
It also depends on what DH does. If he gets a job locally he would be paid less than an expat but could still earn more than he would in the UK. It is tax free but there are hidden taxes in everything! Such as an outlay of 4k just to connect your villa to the utilities, fees for connecting phones, registering cars etc.
I do know families that have come over on one teachers salary so it is doable!
There are plenty of free parks in Dubai, if you know where to look! There are still free beaches too!
Alcohol is expensive and you need a licence to buy it. The cheapest bottle of wine is around 35dhs plus 30% tax.
Eating out in unlicensed places is cheap. Licensed places cost a fortune!