Would it be hard for me to get a job in Real Estate in the US?

I am currently a Real Estate agent in Melbourne, Australia and have been for 2 years. I have a Certificate IV in real estate practises and i was wondering how hard would it be for me to break into the real estate business in the US. My wife is American and missing home and i told her we will try living in the US for a while when we can. I was just wondering how frequent job opportunities come up? what pay should i expect? what other certificates/training would i have to do?.. just all the basics really.. thanks for all of your help :)