The cost is not very expensive, the price is basically based on the course you study, usually a few thousand to tens of thousands of ranges. The length of the course of study is basically one month, three months, six months, nine months, there are also fifteen months. This is better for you to go to the door to consult in person. There are a lot of small organizations playing the price advantage to let you go to learn, but can not learn what technology, this you must look good.