Are there really this many bad deals?

[Antonio Cucciniello]

So I am looking to purchase my first property in Ewing New Jersey (after looking at multi family (2-4) in other parts of jersey and NYC), and after doing about 20 calculations for rental properties in the area, and it seems that I have only found 2-3 that even positively cash flow and 1 that would give a significant amount of cash flow (over 10%). Being new, I am wondering if I am being too overprotective with some numbers for the costs for some homes, or is that on average How difficult it is to find a good deal?