Unfortunately most VFX companies end up going through the following. These would be funny if
they weren't so realistic. I've seen the same things almost verbatim so they're not exaggerated.
Note that a little knowledge can be a dangerous thing since there are times when the client feels they need to define how the vfx need to be done to the experienced vfx people they hired.
VIDEO: VFX Guy versus commercial producer video "This is a fixed bid"
Here's another example how clients work with VFX companies and vfx artists