I've got to admit I'm willing to cut her some slack regarding the neighbors.
First off, I'd bet a doughnut that the apparent consensus opinion is correct and she's being unreasonable. "I'm going to run a studio in an apartment" is pretty damn exceptional to start with.
On the other hand, I've lived in apartments and there's always that one kid you'd grab by the ankles and dash against the wall, but for the inevitable intervention of the police.
I'm not one of Lupa's neighbors so I won't pretend I know who is in the wrong here, although I'd bet a doughnut it's Lupa.