Many times a house that looks great on line is s total dump inside or has a really bad burned down house beside it , railroad tracks , a murder scene  or crazy barking dogs etc .. dont assume anything.

Maybe one of the tenants has their lease expiring in a month, maybe one of the tenants wants out of their lease anyways but doesn't want to break it, etc, but the listing agent and seller are unlikely to bark up that tree without an actual written offer in-hand.As long as you're thinking of finding the solution Day 1 of being in escrow, you will find the solution.

I have found over the years that peoples' bark is a lot worse than their bite.

It’s a true test of your metal when you can’t bark orders.

The plumber told me that the roots may come back in a few years but his process of stripping the bark completely off them should delay that a bit longer. 

Try evicting for a barking dog or too many residents.So, I'm not a fan of taking a year's rent up front.

Pets can cause noise and bark all the time.

Mean or barking dog.

He barked up the wrong tree that day.I wonder if these plumbers are coming up with these insane numbers to make a nice foreclosable debt to the property if the opportunity arises?

In the past, I've received some pretty outrageous notices from my HOA; things like "children no longer allowed in the common areas", and telling me what sidewalk I have to use to get my mail, because the route I was taking took me by an HOA member's house, and made her dog bark.