Houseplants.
It started with a little green in the living room and suddenly turned into a full grown, humid, highly poisonous indoor jungle that’s thirsty as fuck. And it turns out that exotic plants, fancy pots, growing lights, different types of soil for different species, fertilizers, and dozens of liters of water every day are somehow expensive…
Edit: yes, I love it
You’ll need an exception handler for all those dropping panties.