Sure, it makes sense if the landlord was pissed the money got pulled so he kicked her out immediately, but why was he so secretive about it? Based on how Karen described getting kicked out she had no idea why, when I'd think it'd be easy to say "yeah your parents stopped paying and even pulled the deposit so get out."
Can the school's tuition even get refunded? They seemed to be in the middle of the school year so would that still be returnable at this point? And all that withdrawal paperwork was handled in less than a single workday? Well I say that, but the MC was permabanned from the adventurer's guild with the swipe of a card so maybe things are just that simple in this setting. I dunno, at this point I feel like we're giving this setting more thought than the author did.