I am also interested in this topic; however, I am more interested in the finer details.  I have one LLC with one property but 4 units in each.  I am at the company setup dialog for Desktop Premier 2019 (I know, I don't need Premier - but that goes off the topic.... lets just suffice it to say that is what I have).  Do I add the rental units as products, services, or leave the products and services empty?  I have a property manager that collects the rents and forwards them to me itemizing the collections in an income spreadsheet, itemizing the rents received from each unit.  I am just not sure how to setup the company file most efficiently.