Hey, I love case management and try to promote and uplift whenever I can. Your welcome.
I haven't started an independent business from scratch, so I can't really answer the questions about showing outcomes. My best guess is to show how you would determine and base your outcomes on.
Yes, there is a book I recommend, The Case Manager's Handbook, by Catherine M. Mullahy. It's also an excellent study tool for the CCM exam.
I took the CCM in 1999 and passed. It's definitely a good thing to have.
I'd also recommened www.cmsa.org
for more resources. If there is a local chapter in your area, go to a meeting!