Going to Australia for 12 months, need to know can i work when i travel on visit/tourist visa?

I am planning to go and tour Australia for 12 months next year on a tourist/visit visa. I want to travel around and working also. I am a qualified Electrician, would I find enough work? am i permitted to work under tourist/visit visa or what is the method? Also what is the average cost of living? i am 30 now planning to go on a tourist visa and find a job, and start working and apply for the required visa? can this happen....