Help Corbin Overcome Addiction and Trauma

My son Corbin is bipolar and has not had an easy life. His father started having strokes 15 years ago and is in an assisted living facility. I've tried to do my best as a single mom, but with his past trauma, etc., he turned to drugs. It has been an uphill battle for my whole family. I love this boy more than anything; seeing him suffer is killing me. He has Ambetter insurance, but in order to go to a rehab facility, we need $2,000 for a down payment. I can't stop crying because I am scared he won't be able to get help. Thank you to anyone who can help us!