Recent hardscape job....wall block walls and a 28'x22' paver driveway area. Total "estimate" $48,000. Site was full of other contractors, walls were on either side of driveway and best access to the house was over/through our paver area. All excavation complete....rain filled in trenches for walls. La La La.. the point is, with certain conditions out of my control and some areas that I just fell short on my own, I am out about $6400. I have one more wall to build 75"x3' and have asked the homeowner for an additional $1400 above and beyond the additional "estimate." With a blank stare, he says, "The price is the price." The paper work he signed says estimate and there have been changes in the project that have been addressed. What do you do with people like this?? $1400 is about 3% of the total job. He told me that he has never gotten a price, and then had someone come to him and say that it would be more money. Any how, any idea legally what could happen if I walk now at $6400 in the hole? I have collected only 34,000 and have a job cost to date of $40,400. Any help is appreciated. Thanks.