This is definitely an area where you hire someone else to do it for you.
I'm "medical director" of an addiction program, and am VERY happy to report that everything was up and running before they asked me aboard. This is the kind of thing we have administrators and 🙂eek🙂 lawyers for. It will, of course, vary by state jurisdiction. In addition, your payors may insist on certain requirements in order for you to be accredited by them.
We opened a new (additional 16 bed) unit 4 years ago--there was a crazy amount of regulation to navigate just to amend our state license for the addditional beds, satisfy codes, document staffing.... Hiring the staff docs is almost an afterthought.