Doctor becoming Nurse?

I'm a doctor of optometry and I am considering a career change to nursing. The worst part about my current job is that there are absolutely no benefits (i.e., insurance, vacations, retirement, etc.), and if I want to take any time off, I not only don't get paid, but have to find and hire my own replacement. The business is extremely variable and there are times, like now, when I make very little money, while at other times I am very busy. The idea of nursing appeals to me and I believe that the fringe benefits are a lot greater.

My family situation demands that I make at least $100,000 a year and preferably $120,000 or more. Am I going to be able to make anything like that as a nurse? I think I could as a nurse anesthetist, but I don't know if my situation will permit me to complete the educational program, which is full time for more than 2 years after becoming an RN.

Just from a financial standpoint, is a nursing career likely to meet my needs? Thanks for any advice you can offer.