You could contact the brother and let him know you intend to empty his apartment, clean it up, and rent it for a much higher rate.

@David RosenhausThe foreclosure procedure for each of the two states would have to be carried out separately adhering to the procedures established for property in that state.

One way to check is to look for a sewer "Clean Out" cap. 

-Obtain a copy of the note to establish the amount and length of payment.

@Bruce Woodruff They have a 4 year of clean track record, so I’m hoping.

Back then many PM companies worked out a "family" type deal; the janitor got the basement apartment rent free but always had to be on call and the wife was expected to do her share by cleaning the hallways on a weekly basis (this was fine with mom; she LOVED to clean). 

It is up to you, but I would at least charge her for the time it was vacant and any costs you had as a result of listings and cleaning.

As you learn more it will help you establish a detailed goal to work towards as there are many facets of real estate investing and you can't do it all at once.

Move in-out (including cleaning fee)Did I forget anything?

Generally speaking if the credit report is clean, the tenant will pay their bills, including damages.