She isn't your friend. If she had been at one time, that time is long gone. You gave her a date to leave before she moved in and she agreed. She broke the agreement and betrayed your trust. Hotel, motel, Airbnb, immediately. She can rent a car, lease a car, get a taxi. Too much money? Not your problem. She has a job, she has options, just not free options. Tell her she must leave "immediately" that means at that moment, not tomorrow, not this evening...now. At that point you will see if this was a means to establish tenancy or something else. Try it. You have nothing to lose; there isn't a friendship to salvage here. You have a barnacle masquerading as a person who is a friend. She is a barnacle, scrape her off immediately.