i'm in the business of renting out my barn for weddings, events.
Publication 334 (2016), Tax Guide for Small Business
The 80-20 rule was created in the early 1940s for Mixed-use property. Some buildings are used partly for commercial activities, such as retail stores, and partly for residential rentals. The IRS has ruled privately that if at least 80% of the gross rental income from a mixed-use building is from residential rentals, then the entire building is treated as residential realty depreciated over 27.5 years.
You might want to seek the services of a CPA to create you a set of bookkeeping records for your activities who will show you the best filing requirement for your particular situation.
