One of the great tropes of detective fiction is the detective sitting in their office waiting for a case to land on their desk - I think it'd be neat to be able to buy/rent business premises, design the decor with officey things and then have NPCs turn up at your door to give you cases / ask for help for things (or telephone you, or VMail you etc).
It might even come with a small apartment or cot so you could use it as a living space too.
You could even hire a receptionist (probably a bit out of scope, but would at least add another money sink).
You could even possibly tell the game "give me cases of type [x]" and those would show up more often.
It might make more thematic sense than having people ask on public noticeboards for vandals / humiliation / theft etc.
