Which Should I Do First, Weight Loss or Brazilian Butt Lift?

I am 5'5 & 215lbs and working toward a healthier 160-170. My weight seems to carry predominantly in my arms and mid section. I am working with my hubby who is a trainer and nutritionist to reshape my body. I want to get the Brazilian butt lift transfer procedure however I am not sure if I should work at losing more weight before the procedure or have it done then work toward shedding the remaining excess weight. Which method is best?