And that doesn't include additional maintenance costs, which seems to be the most common frustration amongst landlords.Similar to real estate, every landlord and their needs are unique. 

Is the property in a location that is in demand or has a unique view or access to public transport?

Most unique, I bought the property sight unseen from out of state, which is another first.

In my letter's I used mail merge to create a customized letter given their unique property, their name and their estimated sale price based on comps.

The trick is to choose a name that is so unique that it's easy for the person who reviews names to determine that it isn't deceptively similar to another name or already taken.

@Eric Berkner every property has a unique amount of "hands-on" management it may require.Forget what is in the OM and budget based on what will be required to execute your business plan.Class C properties may need more daily supervision and Class A properties require more prompt and high-quality customer service.A good property manager can make or break the deal so don't skimp on that front.

I.E. traffic count/pedestrian activity, proximity to maybe colleges, business, places that draw a lot of people(stadiums, concert venues), uniqueness of the building or what makes it special or some place they would want to have a restaurant. 

Every situation is unique.

Everyone is unique - definitely seek advice.

It’s a bit of both I suppose, my grandparents built that house brand new to their unique specifications.