As gonehuntin said, they are pretty much all 1k - 1200. I have mine inside - tell your mom you'll keep her in a kennel inside. They do fine, and then you wont have to worry about ripping up the house or having accidents in your moms house.
Be sure you are thinking ahead as far as saving up enough money, the initial investment is cheap compared to food, vet bills, emergency funds.
I just dropped in, to see what condition my condition was in.