Investing property in NJ..is it worth

Hi, Friends, I am new in property, even I am renting for my self , I don't want to buy for my own residence since I am not sure like where I need to buy,so I was planning to buy for some investment. my concern is...

 If I buy a two family(floor) home in NJ for $450K built in 1974,no major work need to be done , and get 15 years loan on that, with current rate(I have excellent credit history) and get rate like $1700 from each floor, property tax is around $12k/per annual.

So, what ever I get in rent will go in property tax and mortgage.

but I will get house in 15 years...

Is it worth...I am novice in this field, will appreciate detailed reply on this.