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I am sorry to learn of your circumstances. First of all, is all of the remodel work done and is it done to your satisifaction? In other words, is there still a punch list out there?
Okay, well, from the facts you describe, you are only responsible for paying $14,500, minus the replacement cost of the equipment that they damaged.
Understand, that the contractor may try to sue you for breach of contract/unjust enrichment. It doesn't mean that the contractor will win, necessarily. But it's a possibility that should not surprise you. That's when you pull out the proposal and remind that there were no work order changes, etc.
Good luck and best wishes! I hope that you find this information to be helpful and this answer to be ACCEPTable!
Attorney
Michigan lawyer who explains basic criminal, consumer, and contract-related matters.