Stomatologist,
The good places to practice seem to be taken up, like if you want to be in town in Newport or someplace like that. But remember, no matter how the statistics look on ratio of endodontists to referal basis, you only need one job. You shouldn't have a problem finding that no matter what your needs are.
Most places out there with the exception of central Maine where there are towns where you automatically get your dentures at age 18, have communities that are interested in saving thier teeth. I remember a poll that was taken a while back asking: "How much money would it take to get you to have your front tooth extracted?" I think the average was close to million dollars. Some wouldn't do it for any amount. (You and I might take it, go down to perio and have an implant put in, put a temporary bridge on and walk over to the bank, cause we know)
However, most people realize that in the long run, that having a root canal and a crown done (the most successful proceedure done in dentistry) is far better, lasts longer, and is 1/3 the price of having a tooth extracted and replaced.