All joking aside, my best mate was scooped around the turn of the millenium for firing out a bit of gear on a weekly basis. Nowhere near the amounts you are talking about but he went inside for a year. Remember going to visits, seems grim enough. He made a couple of good mates while in there which made it easier and also kept an eye out for him. Not ideal by any means but it’s not going to be like midnight express either.
Does sound like they have something on him, sean. Maybe recorded calls, emails or a brussel sprout has tied him into the goings on?