If this will be your first cutout, I would walk away.
How thick is the "steel" roof you would have to cut through - is it like thin metal siding, or galvanized corregated sheet metal? If sheet metal, I would walk away.
How much space do you have to work between the roofs? If you have to crawl, I would walk away.
How is the ventilation in the space? If you cant get some cool air, I would walk away. You will sweat outside in a breeze doing a cutout, even with a ventilated suit. Doing one in an enclosed attic might kill you and the bees.
How will you get a hive up there to put the cutout comb in? How will you get it down?
Just some things to consider given your description.