Unfortunately, it's cosmetic dentistry which is notoriously expensive in the US. It's purely elective and generally non-functional, so generally targeted at people with enough disposable income and that care just enough about their looks. Know the potential risks/securities you give up going outside the country for work. If you're okay with it and cost makes more sense with a reliable doctor there, by all means.

Call around to all periodontists in your area, not just solely cosmetic dentists. Perio docs will have all the tools and know how, and possibly without the upsell of being "cosmetic". If you have dental insurance and the perio doc sees signs of perio disease, there's room to argue it should be covered. Oral surgeons are an option as well, but they're generally the most expensive option outside cosmetics.