I do have experience with this. Both with addicts and alcoholics. It's not pretty, matter of fact it can get real ugly.
He will get physically sick sweating profusely and vomiting. Will not be able to keep anything down and will start to become dehydrated. His emotions are going to all over the place, he will be paranoid, he will say things that you really don't want to hear coming out of your son's mouth.
You have to decide if you are up for this.
If you are going to 'allow' him to detox in your home, keep the phone with you, do not attempt to transport him to hospital on your own, CALL 911.
Do what you are comfortable with, but BE PREPARED to change plans in mid stream.
Yes, I have done it with Addicts and Alcoholics, because of my medical background and being an RN I have helped quite a few over the years, however, NEVER ONE OF MY OWN CHILDREN. I would not, knowing how detox can go, EVER DETOX ONE OF MY OWN. That is just me. NO WAY, NO HOW.
J M H O
Love and hugs,