Dub, do you have good health insurance? And if you do, is it through your job? There is this thing called a Mental Health and Substance Disorder Parity Act where your health insurance through your job is to cover that, it's the law as of April 5th, that I know of.
Whatever your deductible is, that is what you would pay, and your insurance would cover your detox, and the provider/rehab would be able to get your inpatient, outpatient covered as well.
I don't know if you can talk to anyone in your HR Dept. if you have one at work, but it would be a good place to start. Because of the parity act, the insurance must cover mental health and substance abuse just as medical attention you'd seek for cancer, diabetes or surgical procedures.