Lt Kilje you will by now have realised that your UK ambition may not be simple.
If you and your family really want to live and fly here, follow the good advice in Parabellum's last paragraph. Once you have an Assessment you can start working out whether and how you can acheive your ambition. Refer also to Whirls's DERA link and Immigration advice.
Finally it's got to be said that there are no job guarantees in this life. So don't sell up until you've acheived everything you need AND have a signed contract of employment in your hand. Meantime keep earning good US$.
It's quite a gamble, your plan. Good luck.