About how much would it cost to get just the tip of my nose smaller? (Photo)

Costs of plastic surgery depend on the location, how expensive your area is in general, and also the reputation and experience of your plastic surgeon.  You can call a few surgeon offices in the area, and most should be able to give you a cost estimate (or a reasonable range) for what you're looking for.  Be sure to discuss your goals and concerns with your board certified plastic surgeon and consider the pros and the cons. Be certain your surgeon is properly certified.  I've attached a link where you can start your search. In our practice, this typically costs around $5000.

Hello and thank you for your question. Based on your
photograph, you may benefit from a tip refining rhinoplasty.  Cost varies based on geographic region and surgeon expertise.  Make sure you specifically look at before and after
pictures of real patients who have had this surgery performed by your surgeon
and not just a computer animation system. The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

Your nose has great symmetry, and the structure proportionally suits your face very well. If you are uncomfortable with the way your nose looks, I would recommend leaving your bridge alone. If you were looking to change the bottom of your nose without much or any change to the bridge, you could look to have a tip rhinoplasty. Tip rhinoplasty is less invasive than rhinoplasty, and can sometimes be performed without general anesthesia, so it can be a much less expensive surgery compared with standard cosmetic rhinoplasty procedures. You have a slight bulge around your tip that could be reduced with tip rhinoplasty, but you may find non-surgical rhinoplasty could work just as well for you.
Non-surgical rhinoplasty uses fillers to add shape and definition to the nose, but unlike surgical rhinoplasty which is permanent, the results only last a year or two. It is difficult to say for sure, judging from these photos alone, but considering that your nose is not large, you might find satisfaction with some injections around the tip to smooth out any bumps and possibly near the radix between the eyes to restore balance.
These procedures range in price. Standard cosmetic rhinoplasty with anesthesia often cost $7000+, while tip rhinoplasty ranges from $3500+. Non-surgical rhinoplasty ranges in price depending on how much fillers are used, which in your case would probably be a small volume. You might expect to pay $800-2000 depending on many factors.