I think that's what he's wanting opinions on. How are the other members that do work on the side like this charging for their labor time?
I know that a good friend of mine did a '68 Charger for a guy and he bid it by the job. The thing that burned him was he bid the job and between bidding it and bringing it to him the owner had the car media blasted. This brought out a lot of issues hidden under the paint that you couldn't see before. He ended up doing a lot more work than he originally thought it was. The guy was understanding as he wanted it done right but he still never made enough to cover his time. I know now he only bids by the hour.
There's another guy local that doesn't do final body work or shoot paint but he will disassemble, cut and fit metal, and reassemble and he charges by the hour also. Of course he's retired and I think he only charges $15-$20 an hour for something to do.