Start out around $20hr. Don't buy into the "don't bring people in" stuff. I ran my studio out of my house for ten years. It was my full time gig and most clients loved it. It was comfortable and down to earth. Clients pay for results, nothing more, nothing less. You will need to start out a little on the low side for payment and once you start to build some client base then raise them a little. I do not recommend you letting clients run your gear unless (a) you test their knowledge of what's going on and (b) you have them sign a "you break it you buy it" clause.
Good luck!
