In these economic times, I definitely understand your desire to save money if possible.
On the other hand, it is very important (indeed, your life may depend on it) to understand that shopping for the lowest price when it comes to aesthetic surgery in the US is very dangerous.
The unfortunate reality is that you probably could find someone who would do surgery on you for that price, and tell you that what they did was a Brazilian Butt Lift... And you may not ever know exactly what they did do.
Or you may end up dead.
A few weeks ago, an ER doctor in Phoenix was convicted on murder after 3 of his patients died while he was doing liposuction and Brazilian Butt Lifts on them. Why did they go to an ER doctor for their plastic surgery?
Yup- because he was cheap.
Please understand that in the right hands, this procedure can be a wonderfully effective and safe way to get the backside you've always wanted- but in the hands of an untrained on unexperienced provider, the risks could be severe.
Save your money and wait until you can afford to see a reputable, experienced surgeon certified by The American Board of Plastic Surgery.