From what I have learned thus far, you have to dig a little deeper than what the intial numbers tell you when using the BP Rental calculator.

You could be off in your calculations of valueYou could be off in your estimation of rehab costsThe listing agent, seller, or both could be off about either of the above.In the case of the first two, there's good news!

I can be overly thorough sometimes so I calculated the expectation of loss based on national statistics regarding type, frequency, and severity (average payout) of claims.

Once you understand what numbers go into a deal and the calculations needed, you will be able to use just about any spreadsheet, plus be able to create your own.

My ROI/ Cashflow is nonexistent, I am mainly focusing on learning and I need to be more familiar with calculating those metrics. 

To evaluate a multi-unit residential purchase in Florida, what is a good rule of thumb (as a percentage of purchase price) to calculate closing costs for the buyer?

The BP calculator said about 350 cash flow.

Bigger Pockets has a great rental property calculator as well as a fix and flipper calculator and book.

I have a great deal UC and my loan officer I believe is calculating DTI wrong.

I really like the rental property calculator...