jobear:
It might be helpful for you to attend a meeting or two of your local Case Management Society. This way, you will be able to network with others in your area that can tell you what types of experience/years in nsg/pay/etc. is likely to be. You will also be able to check on what job opportunities there are in your area. Experience required can vary greatly, depending on the setting and size of the company. Small companies may not have the ability to train you - they usually need people with CM experience.
Another thing you might want to check out is doing CM with an insurance company. Depending on what is in your area, some of the insurance companies are willing to train ....then you can write your ticket once you get some experience under your belt.

Best of luck!