I am Scottish and I've always had the burning desire to immigrate to Australia. Scotland is a great place with beautiful spots. The people here are nice - I may be a little biased there though.
Our financial climate is much better than a few years ago. Education is free, even uni tuition fees. The standard of education delivered here is of a high quality. I work in education here and I've worked internationally and specifically in Oz as well.
We get free prescriptions and the NHS is a great service, even though people moan about it.
Our public transport is good, although we don't have 'commuter' trains like Oz does. This means if your traveling by train it can be a bit more expensive compared to Australia.
Living costs are not too high.. Aberdeen is very expensive for rent and beats Edinburgh and Glasgow in terms of cost but nothing else. Also, the pubs here are brilliant. Running a car can be expensive - petrol costs, insurance and we have to get regular MOTS and services - something I didn't have to do by law in Australia if I remember right.
I had a friend who was a nurse from Oz. She got work in Edinburgh no problem at all. I do know she struggled to register in Ireland. I favour Edinburgh over Glasgow. Edinburgh is surrounded by areas like Fife where you can get a house cheaper, etc than paying city costs but still easily get in and out of the city.
Winter in Scotland is long, cold and dark. That's the biggest reason I would like to move. A lot of time in winter is spent inside. With the fire on. You would probably swap your hot summers inside for cold winters. Visiting for an extended period of time in winter might be a good idea.
I don't know if any of this will help but this post really interested me. I completely understand your dilemma as leaving Scotland for Oz, my family and all the benefits somewhat keeps me here. Could your husband come over for a 6 month or so (winter) period on his own before your family commits fully to the move?
I hope it all works out.