Whatever you do establish your price up front. Have them sign a contract with you that outline your pay structure, this way you will know if they are pulling your chain or just sounding serious about this endevor. I have seen people waste a lot of time and effort over the years trying to set up flight departments over the years when the primary owner wasn't all that serious (yet sounded convincing). Remember most successful business people have the enhanced ability to lead and sell, after all that is usually what made them successful. Besides that Idahoflyer’s post offers some great advice as well.