Putting costs of overall business operation on separate sched E

[Rick Jones]

So I currently have 8 properties, 14 units all rentals. I have read in the past that its possible to put costs for overall business operation and expenses shared by several properties on a separate schedule E as opposed to dividing up the cost and placing percentages of each expense onto each property. For example office supplies, stamps, computer for business use, QuickBooks subscription, mileage tracking app. subscription, umbrella insurance policy, lawn mower used on multiple properties (business use only), fuel for the said lawn mower, etc. These expenses I see as more of an overall business expense and can not be accurately attributed to any one property. So BP what are your thoughts on such a method? Anyone doing this? Any clear reasons not to? Thanks a bunch!