I agree with the answer in the link CB provided because the "cabin/dwelling" was purchased as a vacation home.
I agree with hmdagal's analysis also, with one minor exception. If the dwelling is to be used as their business office for this project then I would not report it either.
The key question is what will be the use of the dwelling purchased? If it will be used as a dwelling it is reportable, if it will not then it's not reportable.
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The opinions expressed are mine and they are not to be taken as legal advice.