We moved out to NZ from the UK for a better life for our children and never regretted it. We took a risk and went out on the visa that allows people from the UK to visit for six months if they have means to support themselves.
OH found himself a job there in the first month and applied for a work visa, and we were there for three years. We would have been there still if an even better opportunity hadn't come up elsewhere.
I don't know where you would be going but we were on the North shore of Auckland and the state schools there were absolutely superb. The children had no problem switching to an international school in another country afterwards.
It was an idyllic three years of sunshine, lots of freedom for the children, and the chance to see a completely different part of the world. One of my favourite memories is when I was teaching at my children's primary school and we all sat on the grass overlooking the water to watch the New Zealand team win the America's cup.
I wouldn't rule out giving it a go without at least doing some research. I have always thought that new countries are pretty much what you make of them. I have read huge amounts of negativity on Mumsnet about every single country in which we have lived over the years. And yet we've managed to have a great time in them.
We've ended up in Australia after a few decades of travelling around the world. To read posts on here, you would think Australia was a cesspit of skin cancer, racists, relentless heat, snakes and unaffordable accommodation. Whereas we have found it to be friendly, welcoming, our children have had good experiences in the state schools and universities here, great medical system, and there has been a very good work life balance for us both. Guaranteed summers and plenty of cold weather too if you want it. UK tourists always point out how expensive it is here without realising that we also earn a lot more for the same jobs.
Obviously, there are downsides to every single country, including the UK! But if you have a positive attitude, you can have a lot of fun seeing the world and giving your children some broadening experiences. It isn't for everyone, but it's nowhere near as bad as it's sometimes portrayed.