Only experience with this: operating agreement and subscription agreement for creating a couple business entities (since there was some considerations about the structure) cost about 25k for the first draft. then about 10k to adjudicate member/subscriber/investor feedback. in general, this stuff covers pay outs, governance, raising additional capital/dilution, etc, etc. there's boilerplate stuff to put in each section but which boiler plate thing to put in matters a lot to the investors, owners and management