Realistically you need to think about where you or your dh can find work, and a visa to work.
Do you have a special European country in mind?
Do you speak any languages? If so, let that decide, because it is so much more difficult if you dont speak/read the language.
Dont assume that everything will work the same way as back home, regards to school, taxes, etc, so you need to CHECK up on everything once you get there, to make sure you do it right. Like, is the financial year also from april to march, or does it follow the calendar year, this is relevant for filing your first tax returns abroad, etc. What age do children start school? 4 as in the UK, or maybe 6?
If you dont speak the language, send the entire family on a language course pronto! It has taken my dh nearly 2 years to learn passable Norwegian, and that is after we moved here, and doing a full time course the first year. He has been relying on me for everything like simple phone calls to ask when a shop is closing.
You have to consider whether you would like to do something totally different, would you both be happy working as waiters? Or do you want to stick to the same careers?
Norway, for example, is a great country to live in, but you cant really survive on one salary, both parents work in 99% of families. But nurseries are heavily subsidised and you pay just £240 per month for a full time nursery place, and schools are free. Living standard is high, and the salary levels pretty even, so a shop assistant has a good salary and will easily live in a house similar in size to a bank manager.
Child benefit carries a higher rate than in the uk, and childcare is tax deductable. Cars are extremely expensive, more than twice the price of cars in the uk. It is not worth importing your car, as the brits drive on the wrong side of the road so your steering wheel is on the wrong side. Besides, import duty, on your own old car, will be so high, to ensure the cost of your car is brought up to Norwegian standards....
My sister moved to Spain a few years ago, and she is grappling with figuring out the differences, as she says Spain is very different to Norway, and by the sounds of it, quite different to the UK too.
Not that child benefit and import duty in Norway will matter to YOU, I am just saying this as an example of how you cant take for granted that things work the same as back home, so you need to double check quite a bit!
But it will be an adventure. And if you are both quite relaxed regards to material living standards and the kind of work you do, I am sure you can have a pretty good life just about anywhere.
But, it is a misconception that finding work and starting life in a foreign country is in any way easier than in your own home country where you know the ropes, the language and how the system works.