Well, if you aren't sure if you would like it but you like warm holidays why not come out on holiday for a couple of weeks and look around. Dubai is changing all the time so you can't rely on what a buddy said it was like a couple of years ago- you have to see for yourself. And anybody who is married and comes here without his wife knowing what she is getting herself into is nuts.
There are lots of jobs for wives but it depends what sort of work she is looking for.