Almost everyone who seeks removal of a nasal hump does so in order to make the nose look smoother on profile. With that assumption, there are several important things to remember when one is looking to improve the profile of the nose.
1. If a hump is removed, several other things happen to the nose which may require additional measures. For example, if the bone and cartilage of a hump is removed, the bridge of the nose is essentially "uncapped". There may then be an open space and increased width to the bridge. This typically is treated by cutting the bone to narrow the bony part of the bridge and using cartilage grafts to close the open space of the cartailge part of the bridge (below the bones).
2. If the bridge is lowered a lot, there can be excessive skin that will not easily drape back onto the lowered nasal skeleton. This can cause unwanted fullness of the skin over the lower part of the bridge, the so-called polybeak deformity. When one has thick, stiff skin and a large hump, it may be better to be more conservative with hump reduction and elevate the bridge above the hump and bring the tip forward. An ideal profile is one in which the root of the nose, the bridge and tip and aligned favorably.
3. The more a bridge is lowered, the wider the nose looks on the front view. Someone with a narrow nose to start with may look fine after the nose becomes a bit wider. But someone with a wide nose and a high brige or hump may look too wide after surgery. In these cases, the front view suffers in order for the side view to look better. My belief is that the front view is more important. After all, we don't interact with others turned 90 degrees to them!
4. Other facial features can contribute to the overall profile of the face. In your photo, I notice that you have a slightly undersized chin for your face. By increasing the projection of the chin, the overall facial profile would be in better balance. The smaller the chin, the bigger the nose looks.
Fees vary a lot around the US. $5-10K is a realistic range.