I want this bump on my nose to be flattened... around how much would it cost? (Photos)

 You appear to be a good candidate for a rhinoplasty surgery. The bump  can be lowered, and the tip can be narrowed. The cost varies by region, and depending on the amount of work to be done. Typically the cost can range from $6000 to $15000

Based on your photos- you appear to be a good candidate for Rhinoplasty- preferably through a closed technique- without a scar across your columella. Be sure to seek an experienced Board Certified PS for in person exam- with a wide variety of before and after photos.