Armani owns a vacation house at the lake. He rents it out occasionally when he's unable to use it. Armani must report all of the rental income he receives on his tax return __________. Even if he only rents the house one weekend a year. If the number of days he rents the property exceeds 10% of the number of days he personally uses it. Unless he rents the vacation house at less than fair rental price. When he rents the vacation house 15 days or more in a year..