@James De Silva  Short answer is at least one..... lolWhen people tell you to look at dozens or 100 houses for everyone you purchase they must mean on-line. 

I used them in ORegon they have a good on line course.

You can do that yourself for free and can even find letter templates for free online.

It's a great place to build an on-line reputation as a local professional.  

Some counties and cities have this online but smaller you might have to go to their office to get.The gas station from the 60's likely has tanks that have been leaking for a VERY long time.

@Alexander SchillerThere are several online calculator to help determine closing costs, here are a couple:http://www.anytimeestimate.com/SELLER-CLOSING-COST...http://www.setcoservices.com/cost_calculator.htmAs for holding costs, you need to take into account:  taxes, insurance, utilities.  

I was looking through LoopNet.com for a multi-unit property, but like most listings online, it does not give all the figures for me to put in the BP rental property calculator.I was wondering how you guys find that information out in order to analyze the property, and find if it's a good deal.

Eventually you will recognize a potential good deal on your own simply by spending time looking online and physically visiting homes in the areas you would like to invest.Another thought is determining just how much rehab you are willing to do. 

I have searched online but I have not found one that I felt could convey my message.

I also do the pro-rata allocation like others for general items not attributed to one property.