Looks like the problem you listed is actually the rental belongs to your bank for 30 years. Theoretically speaking, why would you buy a property with the intention of renting if your research tells you you'll incur a negative cash flow? Normally, negative cash flow are cases that you are looking to flip the property.

As adrianocy said, rent it for 2450 if possible. If not, sell it. I am not sure if there's a way to refinance the loan to longer duration, like say 50 years.