I'm Only 23, but I Hate my Flat Butt. I Also Don't Have $5000 Lying Around. Are There Options? (photo)

Hello dear!
Thanks for the question and provided information as well.
Based on your pictures, you are a great candidate for liposuction with BBL, and I think you'll get very good results. 
Liposuction allows your plastic surgeon to transform your entire shape. You can improve your abdomen, thighs, hips, back and flanks, and of course your buttock, to give you a nice heart shape.
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
The average cost varies a lot depending on the clinic, the country, city and the plastic surgeon. l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

Options include fat grafting (BBL) or buttock implantation.  There are financing options out there to help with the cost.

Best,

The only safe methods for buttock enhancement is the Brazilian Butt Lift and buttock implants.