Our marriage is shit atm already so probably wouldn't survive the long distance which is why DH is probably insisting we move with him.
Ultimately OP, only you can decide.
But this is worrying.
You have already said that the kids' stability is your No 1 priority.
It should also be your mental health, so ... given that your DH will have little time for family life if you do join him, & the marriage is unlikely to be in the kind of state currently where you are going to feel emotioanlly suppported by him ...
Is it better to stay on familiar turf, at LEAST until DH get past probabtion, for the kids' routine, & your own life?
Staying in the UK means less disruption for the kids, which will be easier for you. Staying means access to MH services (I hope you are already managing this at least via GP, if not additional counselling?)
There may be staff to help with the house & kids in the ME, but you are already thinking about cultural differences etc. And that's without the political implications of using (literally) cheap labour from a pool of highly disadvantaged & exploited people. It's not up to me to lecture anyone about that, but consider how it might make you feel.
You might also be very wary of a husband (who is also, I imagine, feeling the effects of the marriage currently being "shit") who is insisting that you up sticks & join him. Once you are there, how will you bring the children home, if he "insists" that he does not want you to?
As to PP saying "you can always come home" well that sounds like either naivety or an assumption that just because DH has landed a job in the ME you will be suddenly minted. Or that you personally will benefit.
Life can be very expensive in the ME, & you say his salary isn't amazing. How would you fund any return to the UK, even supposing you were free to just come back WITH your children? It's not just a question of flights is it - unless you own your own home, waiting empty for your return, there will be the issue of finding somewhere to live, paying deposits etc, all while you are in limbo between 2 countries.
Sorry to be negative OP but I can't see how ME life is going to benefit YOU. What will you do all day, apart from wifework, or supervising staff to do it for you? You don't like the heat, you are itching to get your own career restarted, learn to drive, & recover from PND.
Far from any direct support from friends & family, how likely is it that your main priorities are going to be met?
- kids' stability
- your own career
- independence/driving lessons
- access to MH services
Hold back while DH gets settled, & really think about what is good for YOU & the DC. Not DH. Don't throw your own life onto a plane because DH is insisting that you go along with his plans. I fear you may be very exposed & vulnerable to a man you are currently in a 'shit marriage' with if you agree to join him in what you yourself describe as a misogynistic culture.
Hang on to your own goals OP. They are equally valid as DH's.
And keep thinking about the value of your independence.