Aesthetic / cosmetic dentistry often involves balancing costs, the final result and not least the amount of treatment that you are willing to have. The gum reshaping procedure does vary from case to case so the guide fees are difficult to provide. A well planned aesthetic case involving surgery will often have a trial wax up for the desired shape and position of the finished veneers. This mock up can then used as surgical guide to indicate where & how much bone is to be removed. If the treatment planning i is included in then the fees look better.

If you are not comfortable you should get a reasonably detailed second opinion (not necessarily a second wax up etc ). The problem is that as you like your dentist who has recommended the periodontist , you would probably feel awkward having the work done elsewhere if you plan on staying with your regular dentists.

My first thought is that you should talk your concerns over with your dentist. There may be an alternative with less cost. Although fees vary between dentists, most dentists don’t barter fees much, so they are likely to stick to a quoted fee. But the cost of a treatment plan can vary considerably if you change the specifications.

Let me know how it goes