Originally Posted by notjoe

Those are the type of customers I tend to dislike. They have deep pockets but if they're not paying for the amount of work being done because of all the 'extras' then why bother.

I'd lay it out and tell them that the project has gone beyond what the original quote was for and that you have expenses related to their project and all the extras that need to be covered. If they're happy with your work they'll understand and won't have an issue with it.