The benefit is that you are still saving interest or receiving benefits, but those extra monies will simply stay in your taxable bank account since your non-tax policy is maxed out.  

If you plan to keep this property a lifetime- and you take 50% of it's life's deductions up front.....In those later years as presumably your rents go up, income should be higher...you can have more taxable income. 

Your taxable income from a rental is:actual collected rent - actual expenses - interest - depreciationActual expenses are the things you spend money on that's deductible in the year you spend the money.

Not only are you beginning the portfolio but you also created short term profit with no immediate taxable income.

The standard method is that I have zero taxable income on my rental properties.I hope this makes sense how I am describing it.

So just to be clear your net taxable obligations are based on sale price minus construction costs?