I'm not sure of the best place to ask this question.. but I am hoping
> someone can give me some info, or at least some places to look.. >
> A friend of mine recently started a custom art business.. doing staining and
> woodburning techniques on things like tables, frames, etc. To get started,
> she asked me if I would be her "wood guy", since I had taken a few courses,
> and was interested in getting some tools. I agreed to do
Matt,
I hope your friendship survives this appallingly unbusiness-like arrangement. If your friend has reimbursed you for your materials, then all that remains is to determine a fair value for your labor and your expertise- but of course you will each have radically differing views on "fair value". You really should have figured this out at the start of the relationship.
I doubt you can analyze this very clearly. I suggest you simply float a number you like, hope she agrees, compromise somewhere in between the numbers and remember to never do this again without clear structure.
Rick