I think this would be considered a recreational vehicle and would not be reportable.
Existing commentary 1003.2
Dwelling.
1. Coverage. The definition of “dwelling” is not limited to the principal or other residence of the applicant or borrower, and thus includes vacation or second homes and rental properties. A dwelling also includes a multifamily structure such as an apartment building.
2. Exclusions. Recreational vehicles such as boats or campers are not dwellings for purposes of HMDA. Also excluded are transitory residences such as hotels, hospitals, and college dormitories, whose occupants have principal residences elsewhere.
Commentary Effective 1-1-18:
2(f) Dwelling
1. General. The definition of a dwelling is not limited to the principal or other residence of the applicant or borrower, and thus includes vacation or second homes and investment properties.
3. Exclusions. Recreational vehicles, including boats, campers, travel trailers, and park model recreational vehicles, are not considered dwellings for purposes of § 1003.2(f), regardless of whether they are used as residences. Houseboats, floating homes, and mobile homes constructed before June 15, 1976, are also excluded, regardless of whether they are used as residences. Also excluded are transitory residences such as hotels, hospitals, college dormitories, and recreational vehicle parks, and structures originally designed as dwellings but used exclusively for commercial purposes, such as homes converted to daycare facilities or professional offices.