Paying interest in order to deduct it.

I sent them "Security Deposit Refund and Itemized Deductions" that explained how the Security Deposit was used to fix items and the remaining balance to be claimed to his EMAIL ID.

You may find a regular market company that will insure the vacant structure and the Liability for the same price (with a high deductible). 

They would deduct from seller fees or how it would work?

As such, their book value can be treated as a business deduction.

You're allowed to deduct depreciation of your rental properties on tax returns, which lowers your overall tax liability, increasing your return. 

Once the mortgage is paid off in 15/30 years your $250 cash flow should be quite a bit higher between raising rental rates and no longer having the biggest expense deducted from your gross income (mortgage)Even if you have a mortgage on the property, but after paying that (and all other bills) you still have money left over, that's cash flowing. 

You deduct real estate taxes as mortgage interest on Schedule A.  

I know the difference between GROSS and NET, but my NET income has a deduction of contributions to my employer IRA fund so I think I'd add that back into the NET amount, right? 

When I was active in RE sales, we were able to ball park market value by deducting 10--15% from the asking price of the FSBO's on the market!