I had a contractor look at a job demolishing 6 mobile homes. He gave me a price of 4,000 and I, along with my business partner agreed. After he completed about 80 % of the job, he told me that my bill was up to 6,900. I asked how if he quoted me 4,000 and he said he never quoted me that, he was charging my his time, plus his dumpsters, and the weight of the debris. That is NOT what he said before we decided to hire him. Anyone know how much I owe him, and can I deduct what I am paying someone else to finish the job off what I was going to pay him? Any help would be greatly appreciated. Thank you.