I have been in contact with several NDs in the New England area. One told me that I should expect 15-25k starting out. I then wrote to the AANP and was told 55-90k, this however does not indicate location of practice and duration. I heard from an ND practicing in a hospital and was told 60k. It all greatly depends on buisness skills, area of concentration and location of practice.
Establishing a residency was highly recommended.