Whatever people in the drug and alcohol rehab business might tell you, not everyone needs, or even benefits from rehab. That's not to say that no one needs rehab, and for some people, nothing short of residential care offers much hope of a betterment of the problem, but it's certainly not outrageous to at least try either cold turkey willpower, or some form of outpatient therapy first before committing to the intensity (and expense) of a month or more of inpatient rehab.