My area is made up of mostly second, vacation homes. I mark the occupancy as owner occupied if it is a vacation home used exclusively by the owner. Then I disclose that it is a second, vacation home in the report. If it is managed by a rental agency and is rented most of the year, with the owners visiting on occasion for “maintenance” as allowed in IRS rules, I mark it as tenant occupied. Then disclose in the report that it is a second, vacation home that is rented most of the year. It must be disclosed that this is a second home, because financing is typically different for vacation homes requiring more equity and maybe a higher %. Don’t let the owner or lender pressure you into saying that it is owner occupied with out disclosing that it is a second home. But, stating it to be vacant is like saying the property has been abandoned. If it shows signs of having been abandoned, fine, say so. But if it is actively used as a vacation home, I would not mark it vacant.
Just my opinion.
Mell.