Boy can I relate. I have just kicked my 18 year old son who has been in and out of rehab for the last 4 years. He went to live with his dad who is now kicking him out as well. I feel like this will be the time when he has to do something. he has nowhere to go. All those people who are buying this underage kid alcohol won't want him staying in their houses. He may sleep on the street tonight. The only thing keeping me going right now is the knowledge I have gained from this sight and other readings.
let your brother go. if he is going to stay clean he would do it whether he lives with your folks or on his own. My son uses the money from his job to party.
Hang in there friend.
Krhea