Maybe the cheap lady isn't running a business? You can make money perfectly legal as a hobby :P
She is just staring out according to her facebook, she will soon realize her time is worth money. Shes obviously cheap as shes looking just to get some experience. It her passion and its fun, but it will soon burn her out when she realizes she aint making any money.
I know a lady here that is new and just shot a wedding with Canon XS and kit lens, she charged $100 wasted a day of her tiime, and then worked on trying to salvage her crappy images for a week, and ended up charging only $50 because the were bad. She shot on a sunny day mid afternoon in no shade. All the pics were blown out , coon faces, and 1/2 shadowed. She told me she will nevrer charge so low again. The bad thing is next time she will charge more and most likely get sued.