Codewise, I understand why you can't rent an apartment in more than one building, but we need the command to be able to take a character off a list of renters too.
You should be able to give up a room in order to rent a better one.
You can rent an apartment in more than one building (unless changed recently). Do you mean rent more than one apartment in the same building?
I agree, it would be nice to be able to abandon an apartment.
Totally agree you should be able to do something like 'abandon room'. The landlord shouldn't be opposed either - I mean, they get to keep whatever back rent you've already paid up front.