My cup of tea is definitely Class Tracking for rental properties. You can do it with customer level and reports on customers since you will have a customer tree similar to
Property
Building
Unit
Tenant
and the results you want to fill out Schedule E for each deeded property are based on the property level, but I find it much easier to simply assign a class for each property and in using classes for all income and expense the P&L by Class report is already i place and functional