Loan deductionband taxes

[Adam Smith]

Hi,

My understand is that you can only deduct interest from a loan on your taxes and not the whole loan payment.

say I buy a $1,000,000 apartment building that generates 6% ROI( not including loan payments). And say the loan is 30 year at 4%. The loan payments would be 57k a year. Now at the start of the loan most of that 57k will be going toward interest. But near the end the 57k a year will be going to the principal , so there's nothing to deduct. So I'll make 60k from they property and pay 57k for the loan. Only making 3k in profit but the government will tax me at 60k???

Am I missing something? how do people who buy 10 million dollar apartments avoid this.

Thanks