I worked away as a (very) low earning freelancer for several years after the dot com bust so I'm only knowledgable in hindsight, but.. She complained about my fee – constantly is the #1 indicator that a client will ultimately be a huge pain in the ass you shouldn't have taken on, in my experience.
For a client to "negotiate" early on or from contract to contract is wise and can form the basis of a healthy client/vendor relationship, but complaints are indicative of someone who's happy to see and treat you like a cog in their machine.
For a client to "negotiate" early on or from contract to contract is wise and can form the basis of a healthy client/vendor relationship, but complaints are indicative of someone who's happy to see and treat you like a cog in their machine.