I know when it comes to dental work, that you might be scared of the costs associated to a good dentist in the US. That shouldn't really scare you though and you should definitely look at your options before going to Tijuana to get your procedures done.
Have you ever looked into getting a dental plan? They offer discounts on many dental procedures and are affordable options instead of dental insurance.
I hope you find what you're looking for and get the needed dental work you need done!