I am,currently going through the same thing. My gf who provided me with subutex (which i shot) for 5 years went to jail for smuggling them into county prison. Now I'm screwed. I stupidly figured since the withdrawal from,subutex takes SOOOO long I'd take alot of benzo's. This did help somewhat. Then strangely after 12 days it was HORRIBLE! liquid poop drippin, unbearable anxiety, everything...I thought I was over!! So I even more stupidly decided, as an ex-heroin addict forgetting how intense the pain was, to start taking relatively moderate doses of oxycodone as I do have chronic pain from several spinal fusions, surgeries, etc (all results of IV drug abscesses)...and heroin 3-4 times. Now, after trying to stop, I can't bear the intensity of the withdrawal. So I'm now back to where I was 5 years ago.
Please don't make this mistake.
Honestly, benzodiazepines helped me...until I ran out. Because the anxiety and liquid diarrhea are the worst aspects of the wd'...a,d back,pain for me...but that is mostly unrelated in my case. My only advice is DO NOT take the benzodiazepines ANY longer than you absolutely must. THAT withdrawal you,will want a,d pray for death...that's if the seizures don't kill you first. I'm speaking from experience on,all these issues.
As far as cost..i don't see the problem. Almost all docs prescribe 90 pills a month. I took 1 a day tops. I,could easily vo,a day without ot take a half pill if i chose. That leaves minimum 60 to sell. I live in Philly where I sell them for $10-30 a pill, depending on if sellin in the city or the suburbs. That more than covers cost with or without insurance.
My advice is a diaper and benzodiazepines if you feel you truly must. Which i did feel was. It takes FOREVER...but it's really not that intense; relatively or otherwise. Whatever you do don't go back to opiates. The ming has an amazing way of forgetting that brand of pain. Short or not.