If you didn't factor in the expense of a PM, you could find yourself in a situation where you have suddenly gone from cash flow positive to cash flow negative, and you'll be unpleasantly surprised at having to come out of pocket every month until you are able to get rid of the property. 

I have very specific requirements starting in the ad itself, to weed out unwanted tenants.

If that person happens to be the owner of the house, a subtle difference can make a difference between closing a deal or getting cursed for unwanted marketing call.And to one or another degree this same pattern of interaction will follow you anywhere you go, be it a networking meeting, conversation with the lender, a realtor , an attorney and so on.

It won't take much time, you won’t believe the no. of unwanted things you have stuffed inside the attic.

I get dozens of unwanted spam texts and calls from them daily and there is no way to stop it.

That way, you can just give 30 days notice to end a tenancy, as well as 30 days notice to change any rules, etc.The things that usually wreck roommate situations is unwanted guests, not cleaning up after themselves, messing with thermostats, stealing food.Some of those things can be pretty easily dealt with - like including a weekly cleaning service in the rent, putting little apartment fridges in the rooms.But, inevitably, there will be a roommate who you will want to get rid of, so having month to month agreements is the easiest way to get rid of them.  

Sell unwanted stuff that you probably have around your place or your parents.

Being on the receiving end of a lot of unwanted letters and phone calls is annoying, think telemarketing on steroids. 

It's leaving me with unwanted vacancy and incredibly inconvenient extra payments on spaces i'm trying to fill.

It’s cheap and masks any unwanted smells.