Long term residential rental property which is reported on SCH E, is not eligible to take a home office deduction. So that should make things easier for you.
Typically, someone who owns three or less long term residential properties does not meet the qualifications to claim a home office. There are some exceptions if the owner is a qualified real estate professional that earns a majority of their income working in real estate (and meets other requirements) and while not uncommon, one doesn't see that very much.
