Monthly Cash Flow vs CoC ROI

[Eric Ching]

I'm analyzing a deal in Austin, TX that I would be buying all cash. I plan on holding long term and need some help. After putting the numbers in the calculator my monthly cash flow will be $700/mo. However the CoC ROI is 4%. I'm confused about this part. I thought if a property cash flows high the CoC ROI should also be high. Would this be a good deal? And if it came down to the two would you want Cash Flow or CoC ROI higher? Thanks!