Website and Branding Investment

I am a psychotherapist with a decent income and am wanting to begin including consulting for other therapists in my specialty (online and in-person group therapy). Most of my clients come to me through word of mouth and I am thinking that as I expand my consulting clients will be primarily be finding me online. I am creating consistent content for a fall launch (my podcast, lead magnet etc). I’m curious how important branding and website are and how much seems reasonable to spend?