@Anonymous_ - you said "The relevant reg states that rental periods of less than seven days are not treated as rental activities and, hence, get Schedule C treatment (i.e., Schedule E is used to report income or loss from rental real estate, et al)."
The instructions for Form 8582 (Passive Activity Loss Limitations) state that if the activity meets any of the 5 exceptions listed, it's not a rental activity (for the purposes of Passive Losses). Renting for an average period of customer use of 7 days or less is one of the 5 exceptions. SO, then Form 8582 states that you must determine if your rental of the property is a trade or business activity, which in my case is Yes, then you must determine if you materially participated, which again is Yes in my case. Form 8582 Instructions then state "If the activity is a trade or business activity in which you did materially participate, report any income or loss from the activity on the forms or schedules normally used". This then takes us back to Pub 527, which states "If you rent buildings, rooms, or apartments, and provide BASIC services such as heat and light, trash collection, etc., you normally report your rental income on Schedule E, Part I".
So I think that is an additional piece of written evidence to justify your position and @AmeliesUncle's position in the next post that this activity gets reported on Schedule E, not Schedule C.
