They'll freak out for a minute, even if the seller actually did warn them of an increase, because they always still freak out and get irritated, but then they shop online to see what they could get and unless you price them out, they usually stay. 

But, after I respectfully brought my problem to the city manager, with photos, he got on it and changes were made fairly quickly, and a very irritated building inspector was back fixing things he should have been taking care of LOL.At any rate, that's what I'd do if I was you.  

No tenant wants their rent raised, so she'll initially be irritated, for sure.  

Normally, nobody ever mentioned hearing tenants above them.Then, of course, came the tenant who ranted about how the guy above her deliberately stomped around to irritate her. 

My attitude was really aimed at the types of landlords that irritate me. 

If you want to force a move you could raise it significantly higher, but you might irritate the tenants to the point where they don't take care of the property or worse, decide to damage it on their way out.Rent raises are easier for tenants to accept when they coincide with an improvement of some kind.

There were only a couple times when we had to have a tenant vacate their unit because of a problem - once because the plumbing overflowed and flooded the apartment; another time when the ceiling collapsed (I think because the tenant was banging on the ceiling with a broom handle because she was irritated by the noise from the upstairs tenant).But, in both cases, the tenants were no fun to deal with - even though our contract was very simple and clear on the fact that the landlord was not responsible for tenant belongings in the event of any kind of flooding, etc., and that tenants were responsible for getting their own insurance to replace their own stuff or pay for a hotel, etc., etc., etc.So, no you aren't liable for their stuff if there is a problem - but seriously save yourself a bunch of hassle by requiring insurance, including a loss of use rider.I live in low income senior housing now, and my neighbors are bad about overflowing plumbing, etc., and I can't even begin to count how often the smoke detector alarms go off because of old people leaving the stove on, etc.  

I will also probably be writing a lot of contracts before I get a "bite" which would irritate most agents. 

To all - Sorry if my questions/responses come off irritating.

When you get into calculating IRR, it is a little more complex.