I see. I had a look at the price of keywords. If they haven't been bought yet it's 98 USD to buy one, otherwise, the owner sets the price. While some of them could probably be profitable fairly quickly, I don't have any spare cash right now.
That was my idea too. It will take forever as the minimum amount requires 27273 searches is I did my math right. You can do 40 a day, so assuming you do all 40 every day, which is very unlikely, it will take you 682 days or 1,8 years... I'm beginning to think this isn't the best way to spend my time ; )