The first question that has to be answered (and as others have stated) is it a manufactured home or a mobile home? Big difference in financing options. Second what are the zoning and building codes for that specific area? Is it in compliance with those codes? It is and will remain forever a a manufactured home or a mobile home no matter how much new construction has been done. Or did they remove all the framing, roof support, exterior and interior walls, completely redo the electrical wiring and plumbing? If they did all of that then it would now be a site built home--with many, many, many, many explanations and descriptions in the appraisal report.
Very first thing--call client, describe subject, and let them made the decision of whether to proceed or not.