I’ll probably end up Ebaying my GH2 so my price is whatever I can get. If you got the money make me an offer. My lens are Tokina 24-70 2.8 and 80-200 2.8 in Nikon mount with an adapter. I highly recommend Tokina.
I shot a 50 minute mini-movie this summer so I had another person recording audio using my Marantz 661 with a Rode NTG 3. For what you’re wanting to do I recommend the JuiceLink as Jason said. Cheesycam.com has some recently posted videos all about them.
For support I have a custom cage which is little more than a handle on both sides that I can attach accessories to including my Zacuto EVF which is mounted above the camera on the left side. I made a custom bracket for the EVF and with the use of a manual shutter release cable mounted on the right handle I can actually use my right hand to activate the “focus assist” feature on the EVF by pushing the release cable button. It works great to quickly check my focus without having to take my left hand off the lens.
Get a good tripod with a bowl for quick leveling. An inexpensive jib works wonders also.