A bad tenant can be your greatest expense when you factor in the cost of eviction, unpaid rent and property damage.I actually had my rental agreement, application and all related notices already on my computer, our LLC set up, and my bookkeeping system set on Quick Books BEFORE we bought our building.  

I agree with all of those whom I can already hear through the computer about treating this like a business, and not a hobby.  

Grab a piece of paper (or open notepad document on your computer) and write down the things that went right and the things that can be improved on.

I am working with a partner in Silicon Valley to develop a computer vision based security and monitoring system for multi family properties.

@Aaron LawAccounting Software Recommendations - Quickbooks(Desktop), Quickbooks(Online), Stessa, XeroOnline Storage to save receipts recommendations- Google Drive, Dropbox, Apple DriveExcel - to save information such as tenant name, lease start date, current rent, etc

Chris, QuickBooks Pro Desktop is what you need. 

And I'm full of energy throughout the day.Regarding TV: In my former life I was a computer network engineer.

That's your starting DTI calculation:DTI = debt / incomeNow, compute your net rental income using actuals for existing properties and the rule of thumb for the new one.

Karen -I believe that your goals should be staring you in the face daily not sitting in your computer or in a drawer.  

Greg H. you could try downloading the file on your computer.