Its pretty straight forward without to many variations:http://www.biggerpockets.com/renewsblog/2014/09/06/how-to-crunch-numbers-painlessly-using-simple-rule/I hope you find it useful.Thanks

@Ben LeybovichI just posted a blog today about understanding (as opposed to crunching) the numbers on a multifamily investment.  

In doing research and crunching #s, I'm struggling with getting anything to cashflow with using conventional financing, especially when using the 50% rule for expense estimating.As example, the following property is listed for $75K in my area: http://www.moveinmichigan.com/MIMPubliclogon.aspx?...

I am wondering if the credit crunch on the mortgage side has negatively effected their plans to sell their properties. 

It seems to me that you should now look at every potential deal in that same light ie. crunch the numbers; do they work for Buyer/s that you would be looking to find?

http://coub.com/view/2hd1b[Plenty of threads will tell you how you can crunch those numbers; I trust you are already reading them?]. 

Have you crunched the numbers?

Before we can crunch the numbers, we need to know what the realistic RENT per month would be.

An opportunity has come up and it is on somewhat of a time crunch so I have a few questions.

:Thanks that's what I ended up doing since I was under a time crunch although I like your verbiage better.