@Andrew Mowe haven't read all the comments but here it goes!
In The House Hacking Strategy a quick way to analyze your property is to take your Expected Rental Income, minus your PITI, minus any reserves, and that should give you a number. If that number is zero, then congrats, you're living for free while investing in your first property!
**If you get a number of zero this also means that you will cash flow positive when it is a stand alone rental property. Make sense?!**
If you get a negative number this still might be in your best interest to move forward on the property.
Let's say you get a number of -$200(negative $200 dollars) when you use this system. If you're paying more than $1000 bucks a month in rent then I would still move forward on this, because think about it. You're saving $800/month on your living expenses($9600 annually), basically paying $200/month to live there compared to $1000/month AND you're getting into your first investment property.
**Again, once you move out and fill your spot, it will still work as a cash flowing rental property.**
Hope this helps at least a little bit!!