I think this failed because it was so contrived. Here is a more realistic and reproducible example of how my girlfriend is living variably in NYC. She currently has a lease in Brooklyn for about $900 / month but doesn't need to be there all the time. This weekend she will be house-sitting in NJ, next week she is visiting me in SF for a week, and in December she plans to stay with her parents for the holidays.
To continue to have occasional access to her apartment, not screw over her roommates, and make this lifestyle remotely possible, she listed her place on Airbnb.com. She so far has booked about $700 that will go towards October rent. When she needs to be in Brooklyn, she simply marks her dates as unavailable. Her place is still open for December, but has enough interest that she'll be fine.
Using Airbnb absolutely reduces the friction for these short term stays. If a listing is dishonest, we'll drop it like it's hot. If your host bails on you, we'll find you a new place to stay. SO, sam lessin - Despite having a new lease, don't give up on variable cost living! -Chris