Client is an individual with rental properties. There are expenses which are not allocable or identifiable to a specific rental.  Trade subscriptions and travel and meals are the biggest of these.

I thought of creating a new schedule E to deduct these "common" expenses. But I recall someone in the past saying this was not a good idea. 

I think that the expenses would not be deducted until this activity is disposed. And when would disposition occur? The answer is nebulous.  F 'fake' disposition must be input in the software each year to deduct these expenses isn't right.

I'm going to allocate the expenses. And that presents the problem of the best, or most reasonable, basis for allocation.  Is it time spent, or relative amounts of income each property produces, or something else?

Any ideas are helpful.