How to calculate a good deal ? 50% rule in effect

[Joseph Tarallo]

I am in the process of finding a investment property single or multi family. From what I been reading on here it seems like if you still have some cash left over after the 50% rule and mortgage it is a good investment deal ?

With the 50% rule in effect on the properties I been finding, I'm only seeing a cash flow of 100-200$ with a 20% down payment. I don't feel like that is that great of a return. Is the 50% rule very conservative and typically you should have more cash flow than what the 50% rule shows ?