Being a teacher you’ll be able to find work most places. I assume it’s a standard city finance role, so Sydney or Melbourne would be best. The Brisbane job market isn’t as active. Your husband might be able to get work but there aren’t as many opportunities there. I can’t speak to Perth, it’s dominated by mining so unsure what the finance market is like.
If you do end up in Sydney, Melbourne or Brisbane, you’ll probably have to compromise on your commute time. Unless you’re willing to live in an apartment or have a few million to spend on a house. A one hour commute is pretty standard, most people I know travel more than that. The property market hasn’t slowed down here and will have gone up significantly in 5-10 years. Especially around Brisbane as the Olympics are there in 2032 so prices are skyrocketing.
I haven’t spoken about semi regional towns as I have no experience living there. I love visiting them and if your husband has a generic accounting role they might be worth a look. I personally wouldn’t want to be more than 3/4 hours from a state capital as the healthcare isn’t as good in regional areas. Take a look on Google maps and check how long it takes to drive to the nearest international airport, that should give you an idea of distances.
Once you have an idea of where you want to live, join mums groups on Facebook for the city/town and ask questions about schools and specific suburbs.
For housing look at realestate.com.au and domain.com.au. If you’re buying look at the sold prices for the last three months. If you look at places for sale, if there is a guide price it’s usually about 20% lower than what it’ll go for. It’s usually done by auction.
If you’re renting you’ll need jobs first as it’s very competitive. With steady jobs and a family you should be ok though. You might need to start in an air BnB.
The final thing to mention is distance. Yes it’s obviously far away, but you need to make peace with missing a lot as it’s just not possible to travel back for every event. You can’t be there for family in the way you could be if you’re close by, even from the other end of the country.
Good luck! What’s driving the desire to move?