Power Steering leak
 

o.k.. so I am driving, and my steering is rough and starts creaking. i check the fluid and its low.. I refill it, problem goes away. I DON'T see a puddle or dripping under my car, but I've had to put at least 8 bottles of power steering fluid in the last 2 months. I know I have a problem, but i'm a little tight on cash to go to a mechanic. anyone have this problem ? guestimation how much to fix it ? could it be something else ?