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I had the chance in the late '90s, having been working in Ottawa and Calgary as consultant to a couple of hi-tech aerospace companies for several years, but decided not. At the time most of my colleagues there were desperate to emigrate to the USA to progress their careers in our business.
I also had the opportunity to join another client in Minneapolis, but also found the climate there oppressive, cultural and intellectual stimulation lacking, and holiday allowance oppressive. Besides, I would have been required to take up US Citizenship, and some other stuff, which comes with a lot of complications.
Madrid, Rome and Munich suited me better, and in none did I need to bother with immigration formalities, being sponsored by the clients in US and Canada, in the EU no problems then, typically working one month in country, 2 weeks back home. Where I paid all my taxes and benefited from the NHS. I was too busy to take advantage of the hunting opportunities that might have been available, and it wasn't a thing for me back then.
A missed opportunity, perhaps.
To the OP I'd suggest living, even working if allowed, or at least taking a long holiday there first, if you are not already familiar with the country and region you are considering, particularly if you intend to bring up a family there.
If it doesn't work out, well it can be complicated to return to the UK, particularly if you have sold up here, married abroad, or have had children in another country, or got money stashed overseas.
Just a few things to think about, and sorry to seem a wet blanket, by all means follow your dream.