Emigrating to America

Australia has all of the features you mention.

But I think this is a bit of a red herring. Australia and the US both offer a wide variety of divers environments because they are very big. But, precisely because they're very big, the fact that they're in the same country as you doesn't mean that they are accessible or convenient. Living in Ireland, you're much closer to Alpine ski resorts than the East Coast of the USA is to ski resorts in the Rockies, for example. If raising your kids with plenty of hiking, skiing, camping and so forth is important to you, you don't have to go either to the US or to Australia to do that. What matters is not whether the environments, facilities etc that you want are in the same country as you, but how accessible they are to you.

I lived there for a few years and had the option of returning but have pretty much fully decided against it.

Really enjoyed my time there and there's a lot positive about it. But there's a lot of negatives also. If you live in any of the "popular" places it's very expensive and even in my time there which overlapped Covid, the idea of monetizing every opportunity grew. Also, and more importantly, the cost of healthcare both in real terms and the potential impact to your job prospects should you get sick are pretty drastic.

I live in a European country right now and it is light years ahead of the US in being a society designed for the people who live in it. Glad I lived there, glad I'm not there right now.

I lived in New York illegally and after 3 months came home and gave 10k to put double glazing in the home place. That was 99 . Then 911 happened which took most ,but not all my work . If I was fit I'd go back in a heartbeat