I would always advise patients against traveling outside the US for surgery of any kind- in my Orlando Plastic Surgery and Skin Care Center, we see at least one patient a month who had surgery abroad and now has a complication. Sometimes treating these patients is simple and straightforward, and in other cases it requires surgery- but it is always at additional expense to the patient, and can lead to problems they would not have had if they had had their surgery by a reputable, board certified plastic surgeon in the US.
In many cases, these patients have a hard time finding a plastic surgeon in the US willing to see them, as no one wants to take on the liability and trouble of another surgeon's complication...
Please be careful.
Having said all of that, and while it is very difficult to say exactly what your costs might be without first seeing you for a consultation, I can tell you that the average costs for a Brazilian Butt Lift in our practice range between $9000 and $13000.
Please also read the following articles about safe plastic surgery and finding a surgeon you can trust: