Don't despair as each component can be solved. 

This deduction is related to the loss on disposal of certain assets in your building such as replacing or removing existing components of the building.

@Jim Cellini there is two components to property taxes:1.

How much more can I expect to spend on the other components of finding leads through a website?

Have the property inspected to determine condition and life expectancy of major components and appliances.  

@Mike Dymski has addressed this by bringing in the real estate professional component.

Real estate development has so many components.

However, buying at the right price after identifying areas to increase the value, can result in higher yields.Value add components of a property deal can include renovations, repairs, building reconfiguration, additions, subdivisions, vacancy lease ups, assemblage of other properties, zone changes, debt restructuring to name a few.

Question; are you able to expand on the liability component?

The problem with looking at Case-Shiller as a stand alone valuation of housing is that it only measures one component of RE as an investment- value.