@moggett I think until you first begin speaking to beekeepers, you assume that they are trained/ experienced/ insured to the point of being able to extract bees from anywhere.
I have a number of friends in the trade (I have a good friend who is a handyman and another that's a roofer), but I'm pretty sure they would be quite nervous about being present with so many bees around given that neither has dealt with them before.
Good suggestion regarding contacting local associations. I've started to believe that my roofer/ beekeeper dream mustn't exist. But I will hold out hope that perhaps there is someone who does hold all of these skills.
Has anyone here worked with a tradesperson in a situation like this before? Do you think a beekeeper could provide enough guidance to a tradesperson that hadn't worked with bees to enable safe access?