The issues with mental health care are largely a lack of funding (including via insurance).
If you are going to fund an asylum system well enough to be effective, you could fund our current system. If you are not going to fund it, you are literally reproducing the cycle that resulted in underfunded, abusive and hidden asylums of the 19th and 20th centuries.
I'll assert that, in the current economic environment, you can't staff it even if you reasonably fund it. i.e. you will not find enough applicants who will stick with the job even at insane and unsustainable wages.
If you are going to fund an asylum system well enough to be effective, you could fund our current system. If you are not going to fund it, you are literally reproducing the cycle that resulted in underfunded, abusive and hidden asylums of the 19th and 20th centuries.