Interest expense as a deductible, Depreciation expense as a deductible and Principal paydown as a piggy bank. 

The issue is our land value is high, so the structure value is low compared to the overall property cost. 

It's simple enough to make a row for income, and another for expenses, and then subdivide those expenses, and add them up in the total expenses cell and then subtract the gross income from those total expenses to get my net.

Simply report your accurate rents and expenses which you should be tracking as well and not simply relying on your property management company and their reporting. 

They last AC unit I put in was a Trane which is a little more expensive, but they are great units.

. $50k land value on a $600k property sounds very low / possibly incorrect 2.

.- They add 15% margin to the repair costs.They don't have good accounting system to get good clarity on monthly transactions like rental payments, expenses, etc.  

That seem like a very low for a furnished rental.   

DC is very expensive and so many of these workers live check to check even though they make decent money.

1,300 is too low to get a deal from your first campaign (and too short of a time - 8 days).