Cash Flow Requirements- Pennsylvania

[Connor Vanin]

Hi All

I am close to purchasing a duplex just outside the Lehigh Valley, in Pennsburg. I have everything worked out on the spreadsheet, and I would be looking at a average monthly cash flow of $150, after mortgage, expenses, and putting away 10% cap ex, 5% maintenance, and 5% vacancy. The gross rent per month would be 2500, both units are 3/1. 

I am worried that the cash flow may be too low for my trouble. Can anyone give me some thoughts on these figures? The COC% would be 8.01% at these numbers. This would be my first property.