I've given up on Carol. Black Friday girl and Mistlehoe were possible in their respective time limits, but I've just unlocked Carol's 3rd picture, and her 4th picture requires 25,000 points. If you don't have the 4 santa hats also required for that stage, that adds another 24,000 points. Because I've focused on getting all the time limited girls unlocked, I still havn't unlocked Indira's last 2 pictures, so I don't know if her income gets alot more generous. Hoping the next girl they add isn't yet time limited.