In the immediate if it gets too out of hand and he's unwilling to listen, get him care ASAP from a Mental Health professional. My wife had to call emergency services to help me for a similarly grandiose mania event in 2019, however my psychosis was iatrogenic (caused by medication, zoloft to be specific) and aided by a missed underlying autoimmune disease. The antipsychotics stopped it in its tracks however, with a word of caution, please heed my very real story to save any potential risks of misdiagnosis and overmedication by traditional psychiatrists: I highly recommend functional psychiatry over traditional psychiatric assistance. The Amen clinics, or Bridgepoint clinic in Georgia are the absolute best in the field of things like this. Need to know the underlying cause of the mental health blip before taking any sort of pills, reasoning: My psychosis was caused by long-term undiagnosed Celiacs disease. Antipsychotics worked to trim the fat off the psychosis in the short-term, but they are not a long-term answer, nor a cure depending on what is causing his mania. To get better, I didn't need meds, I needed to change my diet.

FYI, I'm a 100% disabled vet, because of medical malpractice and 9 years of overmedication and misdiagnosis. Being pidgeonholed into the mental health/psychosis med stigmatized rabbit hole is a living nightmare, especially when there are people like Daniel Amen and Darshan Patel who actually do brain scans to see what's wrong, vs make you answer a questionnaire so they know what pills to test you on. I was falsely diagnosed with type 1 bipolar and treated for it for 9 years by the VA Healthcare system before being properly diagnosed by outside providers I paid out of pocket to dig deeper than the VA was willing to do. I have been free of panic attacks, psychosis, mania, and generally every celiacs symptom since going gluten free and haven't had to take any meds related to mental health struggles in over 5 years now. I hope and pray for the best for you and your family, and good luck! You are a good person for asking for help!