Hi,
Having just done the exact opposite, moving from NZ to the UK, I would say that unless you are BOTH 100% on board, I'd really not do it.
It's hard. Damned hard.
The reality is ALWAYS going to be harder than how you picture it.
For us, in particular, with two girls aged 12 and 14, the stress of getting them into the education system, and the worry of how this is going to impact on them, has been immense. (It's their first day today, so I'm shitting bricks as to how it goes for them!) I don't know how old your children are, but it's a definite factor as to where they are at in their schooling - this was the very last year we could contemplate this, as DD14 is staring down the barrel of new country, new culture (and it is, we speak the same language, but it's still a heck of a culture shock), new school - oh, and GCSE's. No biggie.
It is very different on holiday in contrast to dealing with real life - dealing with taxes, setting up services, getting into school, work, finding somewhere to live, setting up a household for scratch - waiting and hoping for the stuff you ship to eventually catch up with you. . . we came over for a three month secondment to determine whether we could do it. We were still cocooned from all the above, in our AirBnB, and 'homeschooling' (which we were very slack at!).
Even giving it a go for a year - huge expense and disruption. And if you're strong family folk, and you don't have strong family links over there, that's going to be a major factor.
(Sorry for the novel.)