Honestly roleplaying a head of mafia in prison and making a mini-family in mafia is bad portrayal of the modern organized crime, I started like that 3 years ago but realized thats a no-go and switched to being a simple prison gang, because there is no-way a crime family would participate in such low tier deals of a prison, even if their boss is in that prison.

Exactly, that's why I didn't name my gang ''The Falcone Crime Family''. Setting up a crew is enough, I believe.