I can see how it would be very difficult for you and him. Is he the type of person who gives up easily at the sign of a struggle? I am consciouss that some people do and some people don't, that's the way it goes.
I would say, I imagine you've spent a huge amount of money moving over. Can you remind him of that and that it would be worth putting in more time than a month! As hard as it seem now, I'm sure with utter perserverence and a touch of luck life could get better. Yes it can be all about jobs.
I'm going to be a bit of a D. Advocate here and say your OH sounds a little insensitive and a bit selfish. Can he see the whole picture?
Perhaps life in Ozzie is not for you both - perhaps it is - however, a month will not tell you.
I think sit down, put all worries on a piece of paper and all the good things on another. Draw up a plan and say right, in a year's time we will relook at whether UK is best for us to return to.
In the meantime, we're here, we spent loads of money to get here, we're doing something so many others only dream of - lets make a real go of it. Set a realistic timeframe and both stick to it.