Buprenex comes in 0.3mg/ml for use in pain relief. 0.2mg Temgesic and 0.3mg Buprenex are the dose units for pain relief. HIgher doses of Buprenorphine are generally needed for opioid replacement therapy, for maintenance or detox/taper, which is why Suboxone/Subutex come in much, much larger dosage units (and also why Subutex and Suboxone are not allowed to be used as pain killers).
I support the use of Buprenex (and IV Buprenorphine in general) in maintenance treatments. However, this treatment modality is really only useful for maintenance, not detox (due to the shorter half life of IV vs sublingual Buprenorphine, and the peak-baseline-sick high-low peaks of IV vs sublingual Bupe). Plus, to properly calibrate the right doses for an individual, a medical professional (specifically an addiction specialist, or pain mangement doctor, or any medical professional familiar with narcotic dosing and addiction) is needed.
You only have, in total, 10ml (3mg) Buprenorphine. This is not enough to taper effectively.
I understand the high cost of Buprenorphine treatment via office-based doctors and prescriptions.
There is another option. Many established Methadone clinics offer Subutex/Suboxone as well. You would have to attend the clinic like a MMT patient, but you would be given Buprenorphine instead, and it would be up to you whether to do maintenance or detox/taper, and at your own pace. The cost would be the same or in the same range as MMT (i.e. $12-$20/day).