Is Cash flow per door a good indicator of a good deal?

[Bryan Tasumi]

Is Cash flow per door (after all expenses, mortgage, cap ex, etc.--i.e. everything) a good indicator of a good deal? Can you analyze whether a deal is good or bad based solely on cash flow per door? If so, what is the amount of cash flow per door you need? Will looking at cash flow per door always translate into a good cash on cash return, cap rate, IRR, etc?

Any examples of when cash flow per door (after all expenses, etc.) doesn't work?