Many pets will be hard on your unit and you want to collect money for these extra upkeeps.

So glad we didn't waste extra time and money accommodating them.  

Just a few extra thoughts based on some of the additional comments. 

Make sure their security deposit is sufficient to cover the extra turnover costs and your extra risk.

If you are already in position and have the time for the extra job, flip away while saving the cream of the crop for investments!

Huge extra risk there.

"OK Mr Smarty pants Chris, why don't I just pay extra from month one to get it paid off in <20 years?!" 

Hi all,I am completely new to real estate aside from doing some manual labor for some extra cash here and there.

I rent the extra two rooms and the renters pay most of my mortgage.

In the end, I never had to move or sell my house, I kept most of the rental property (for some reason she didn't think they were worth much or didn't want to deal with them), and was used to living on almost nothing, so once it was all over, it was like all of a sudden having a large amount in extra cash each month because it wasn't being spent immediately upon hitting the bank account. as a result of maintaining a level headed relationship with my ex however, we didn't need to liquidate or sell the business we still have (as our lawyers were trying to convince us to do)... hopefully in the end things will become very good for you also.