@ThatLilacStork i moved my kids away from their father (we are not together) two years ago. It wasn’t as big a distance as yours suggests. Are you moving to Middle East?
anyway, I didn’t have his support so I went to court - and won. The big factors to ascertain if kids will settle is how they feel about it, how resilient they are, and how you plan to ensure parental relationships are kept healthy (your child arrangement plans).
My experience of moving, and if you were my friend what I would be telling you to sit up and pay attention to is -
kids might like the idea, but the reality is harder. Much harder. There are many months when friends are missed, there are birthday parties but they are not invited, the food isn’t the same, life is uncomfortably different. They need to get over this hump just like an adult does. It takes a bit of time as making friends is organic. Don’t underestimate this.
If your kids are going back and forth, I think it leaves you open to them resisting returning on one of those visits, and then a whole new world of issues opens up. How would you feel out there with only one child willing to come back out to you? Would you let one child stay? Would one child come without the other etc? It’s a can of worms.
Schools, bank accounts etc, you can actually do A LOT in two weeks child free. You don’t need a few months to get set up.
This can be made massively easier as you and ex are co-parenting so well together, but everyone can turn. Just keep that in mind. A significant difference in opinion can still happen. People can change their minds on plans committed. I’d be careful.
Personally, I think you’re drawing out the difficult phase with your plan. Get the kids over as soon as possible. Ten days after you or something. Would ex come out with them to see the place?
Have a really concrete plan for trips over and back, top heavy for first eight months, but allowing for some roots to establish in new country too. Easier said than done I know. School will open up so many doors for you.
We are 2.5 years post move and we are all and truly settled. I also underestimated how much I would be preoccupied with them settling and waiting for signs that it was after all a good choice. It was tough on me, but green shoots appeared and they found their way.
It sounds like a great opportunity for you and the kids to have a different life experience and make money and better your career. I think it’s fantastic and as you have your exes blessing - go for it!