Is this normal? 

This is normal and nothing to be overly concerned about.

This is a good place to expand your vocabulary on what all is out there and what you may like to do or be good at.

Remove "Cash-flow" from the vocabulary. 

Very normal.

Is this normal cost or high?

Ensure you have an itemized invoice from the cleaner, which can help justify the deduction.Reasonable Deductions: Long-term tenants often leave normal wear and tear, so I recommend being lenient on minor issues.

Loss of Use / Loss of Rents: Normally, there is a 20% included limit.

This normally would not be an issue but the cost of the water/sewer is extremely high in this area and specifically because the meter is a one inch, the costs are much higher than a normal 3/4 inch on a non-duplex. 

Normal wear and tear would be a few small nail holes for hanging artwork, a clock, etc.