Redlambs
Creator of the Caftards comics
Easy. A cult is just a minority religion. Get some guys, get a name, maybe an acoustic guitar with a rainbow strap - you're a cult leader!
If I were you I'd make it one of those fun cults. With blackjack. And hookers.
Bingo!
But seriously at what point does it become mental illness to be standing out in the rain shouting nonsense about monkeys and earthquakes? I particularly enjoyed heckling him when in the very same sentance he says god is all loving and judgement is coming! So I asked him (very loudly) if he enjoys judging his wife and family in his warped view of what love is. That got a lot of laughs by passer bys, but it was a serious question to him.