Make 20 dollars per hour

You need an Adsense account and an Adwords account for this. So check on the keyword checker tool to see how many searches each months your subject get. Then make a website with good content about that subject. Then put Adsense adds on your website. And now the hard part: You need a good AdWords campaign for extra visitors. Make for every page a new campaign with there own keyword list. You need a low bid on keywords so 0,03$ to 0,06$ for every keyword is a good amount. With a huge list of keywords you get more chance for more visitors. Make a few websites more to increase your earnings. And make your website with multiple languages with there own AdWords campaign to increase your earnings even more.