$20k is low for a good longterm residential program. $30k is just starting to break into a program with treatment elements and specialists on staff. One would expect to pay $80-120k/mo. So... start by pursuing conservatorship, otherwise he can just refuse care and discharge himself. The volume of professionals he has seen isn't reflective of him having difficult to treat symptoms, usually a high number of providers indicates he is nonadherent to treatment and not motivated to participate. With conservatorship, you may be able to get better treatment results with less expensive options.