Private Duty Nursing

I'm an LPN in Ohio and have many years skilled nursing home care experience. I want to do private duty nursing on my own. Several families have contacted me prompting me to consider this. I am preparing for retirement and think I will pursue this idea.

My question: How does one establish a fee schedule? I have no idea what would be a fair rate for my services. I still have to pay into social security to raise/maintain my benefits at the point of retirement. I have always carried my own liability insurance and understand I probably would have to upgrade my coverage. That, and all other expenses would be my own.

Any suggestions re: a fair rate of pay are appreciated. I don't know what to charge since I can't bill any outside agencies, I have to bill the family. I am aware of homecare aids charging $8-10 an hr. from when I had a need for my own mother 10 yrs ago. But as a nurse, I am lost. I want to be very fair, but I still have to survive myself. I am a strong advocate of keeping patients in their own homes as long as possible.

Also, are there any required documentation you can think of to protect me and my license? I would keep visit notes, med sheets and a family communication book. Any other suggestions would be appreciated.
Thanks in Advance for any assistance you can offer!
When I worked private duty my client offered and paid me a significant amount above the rate that my agencies had been paying me. She found out that amount by talking to me and the other nurses. It was $6 an hour above my agency pay. Actually, that pay rate was only $2 an hour above what the good agency paid their home health nurses. And this client paid the employment taxes for me, so that made it better.

In general, depending upon your area's prevailing wages for home care, an RN would look at private duty for anywhere from $22 to $30 an hour, if that helps you find the ball park.