I would provide RESPA (you are taking a security interest in land upon which a mobile home is located) and TIL documents(consumer purpose loan). No flood since you are not taking the mobile home. I have heard discussion as to whether you can take a security interest in land and not what is on the land, but I do not have personal knowledge to contribute to this. To be safe, you may want to do a flood determination just to make sure. What are the terms of the loan and how much land do you have? This information could change the answer.
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The opinions I express are my own and not the opinions of my employer.