Australia likes it qualifications, you can apply for your visa with uk qualifications ( city guilds ,I have craft ,advanced craft and HNC) and you get your visa, but if you wish to trade out here they don't recognise them to get your licence , I did a intense 29 day course through master builders and Taffe to get my licence all up cost me around 13k , lots of course work and the time off work was hard going to keep on top as well as work
i sub contracted when I first came out and once they know you are switched on and capable I got promoted quickly to run jobs and then a project manager.
I now run my own company
Good luck