You want a straight answer to one question. If a real attacker came for you tomorrow, could they pull off your worst day, and how far would they get before anyone noticed? The honest way to find out is to have skilled people try it, on purpose, and see what holds.
Three things, and what each gives you:
Before any of it: the seven moves that cut real breach risk for $0. Most worst-days walk through doors those close.
Spend nothing first →