Thank you all for your insight. His Dr. has upped his meds hoping to level him out. I have two brothers that, as much as they profess to want to help him, they are undermining everything that I do. Giving him alcohol, telling me to turn his phone back on, etc. Thanks to you guys, I can now see that the tact I was taking was the right one. I feel like I have to do whatever I can to try to stop him from getting in deeper financially, from hurting my mother any more than he already has, etc.
Again, thank you for your advice and if anyone has anything to add, I will be very grateful!