I am installing a heating system in a new house for a homeowner. This is the third new home that I have worked on for this particular person. The job is partially completed. I am waiting for him to get sheetrock and paint on the walls so that I can install baseboard registers. He is coordinating the finish work himself, so it will probably be 8 months before he is ready. He wants me to come in and do part of the work before he is ready for the finish. I told him that if wants me to come for a special trip each time he has a little more done, I would be willing to do that, but I would want a partial payment on the contract amount after I did that portion of the work. He refused said he does not have to pay me any more until the job is finished. He also said that he has no money at this time. He then contacted an attorney. The attorney told me that the homeowner is hiring another contractor and I need to provide them with an itemized statement of what I have into the job so far. I told his attorney that I have been following the contract and the attorney has not disagreed with that. Any advice on how to proceed would be appreciated.