Buy & Hold property-yes/no for cash flow?

[James Wesley]

First time multi-family investor here. Using the Rental Property Calculator But having a hard time reconciling the number since I keep coming up with negative cash flow regardless of how I update the numbers. Thoughts on this Dallas duplex in great area?

$659k list price

$4100 in current rents..close to average. 

I'd put 25% down with 5% loan.

Thanks!

James