I'm going to be blunt here, so Carol will yell at me. But Here goes. I think your strategy is wishful thinking. It won't work.
There have been a whole bunch or recommendations as to why hospital de-tox works. Your main objection is the dire fear of boredom, and I don't think you've really read what others have said. All I hear from you is "Yeah, but..." You're not afraid of being bored, you're afraid of de-toxing. Hey, if you don't want to do it, then don't. But don't ask us to endorse your decision.