How Much Does a Smile Makeover Cost?

I would recommend that you go to your dentist or a cosmetic dentist.
There is so much involved in deterring the cost of a smile makeover and whether you are a candidate for this procedure.
You may also need specialists like an orthodontist to straighten your teeth, or a periodontist to fix your gums or gum height if you have uneven gums when you smile. Are you missing teeth or is your occlusion poor.
Price could also vary depending on the expertise of your dentist and the dental laboratory he uses.
The price can vary from a few thousand dollars to $300000 Plus.

In cosmetic dentistry, most often you get what you pay for. Meaning that if you pay very little, you may not be happy with the results/may get a less than ideal result. A smile makeover can mean many different things, and it's important to consult with you dentist to find out exactly what he or she recommends to meet your expectations. Often times, I will have a patient bring a photo of what they want their smile to look like and compare photos of their current smile to it and talk about what treatments they may need to get a smile close to their expectations. Some patients need very little modification to get what they're looking for while other patients may need ortho (braces), gum procedures, crowns, etc. This is where you dentist can help explain exactly what YOU will need. 
Just a side note, I do not recommend the "snap on smile" as a long term smile makeover option. I've seen patients pay for it and were happy with it for a few weeks, maybe months but then it either broke, discolored, or wouldn't fit and they were unable to use it moving forward. Composite veneers (aka composite bonding) is also a good option that can be more affordable than getting porcelain veneers or crowns. But with composite veneers, you want to make sure find a dentist that is skilled in performing this procedure with lots of experience.