Yeh im making around 150 a week give or take, I got into it quite early tho, whatever you pay for the hardware you will always get back as the demand os high so take that into account, difficulty also increases regualy and when it does your machine generates less coins as the get harder to mine you can combat this by using you earning to buy more hardware until it becomes un proffitable to mine litecoins then eiver sell your hard ware cashing in that way or start on the next coin, my pal has being building 2 new rigs a month and cashing in some proffit from what he makes you could always hold onto the coins anticipating a huge increase in price or just cash in weekly
Thinking about a second machine after christmas just to mine secondary coins incase they jump in price I also wouldnt mind playing some games haha